166131670674881 has 4 divisors (see below), whose sum is σ = 166141933968432. Its totient is φ = 166121407381332.

The previous prime is 166131670674847. The next prime is 166131670674917. The reversal of 166131670674881 is 188476076131661.

166131670674881 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166131670674881 is a prime.

It is a super-2 number, since 2×166131670674881² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166131670674811) 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, 5131622495 + ... + 5131654868.

It is an arithmetic number, because the mean of its divisors is an integer number (41535483492108).

Almost surely, 2^{166131670674881} is an apocalyptic number.

It is an amenable number.

166131670674881 is a deficient number, since it is larger than the sum of its proper divisors (10263293551).

166131670674881 is a wasteful number, since it uses less digits than its factorization.

166131670674881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10263293550.

The product of its (nonzero) digits is 48771072, while the sum is 65.

The spelling of 166131670674881 in words is "one hundred sixty-six trillion, one hundred thirty-one billion, six hundred seventy million, six hundred seventy-four thousand, eight hundred eighty-one".