166151506615057 has 4 divisors (see below), whose sum is σ = 166249415577636. Its totient is φ = 166053597652480.

The previous prime is 166151506614967. The next prime is 166151506615147. The reversal of 166151506615057 is 750516605151661.

166151506615057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (166151506614967) and next prime (166151506615147).

It can be written as a sum of positive squares in 2 ways, for example, as 136104982291216 + 30046524323841 = 11666404^2 + 5481471^2 .

It is a cyclic number.

It is not a de Polignac number, because 166151506615057 - 2²³ = 166151498226449 is a prime.

It is a super-2 number, since 2×166151506615057² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166151506614989 and 166151506615007.

It is not an unprimeable number, because it can be changed into a prime (166151506618057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48954478744 + ... + 48954482137.

It is an arithmetic number, because the mean of its divisors is an integer number (41562353894409).

Almost surely, 2^{166151506615057} is an apocalyptic number.

It is an amenable number.

166151506615057 is a deficient number, since it is larger than the sum of its proper divisors (97908962579).

166151506615057 is an equidigital number, since it uses as much as digits as its factorization.

166151506615057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97908962578.

The product of its (nonzero) digits is 5670000, while the sum is 55.

The spelling of 166151506615057 in words is "one hundred sixty-six trillion, one hundred fifty-one billion, five hundred six million, six hundred fifteen thousand, fifty-seven".