166632615411553 has 4 divisors (see below), whose sum is σ = 166632649924288. Its totient is φ = 166632580898820.

The previous prime is 166632615411527. The next prime is 166632615411599. The reversal of 166632615411553 is 355114516236661.

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-166632615411553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166632615411494 and 166632615411503.

It is not an unprimeable number, because it can be changed into a prime (166632615414553) 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, 8549901 + ... + 20158522.

It is an arithmetic number, because the mean of its divisors is an integer number (41658162481072).

Almost surely, 2^{166632615411553} is an apocalyptic number.

It is an amenable number.

166632615411553 is a deficient number, since it is larger than the sum of its proper divisors (34512735).

166632615411553 is an equidigital number, since it uses as much as digits as its factorization.

166632615411553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34512734.

The product of its digits is 11664000, while the sum is 55.

The spelling of 166632615411553 in words is "one hundred sixty-six trillion, six hundred thirty-two billion, six hundred fifteen million, four hundred eleven thousand, five hundred fifty-three".