166420526456564 has 12 divisors (see below), whose sum is σ = 300630628437888. Its totient is φ = 80526061188600.

The previous prime is 166420526456537. The next prime is 166420526456573. The reversal of 166420526456564 is 465654625024661.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is a junction number, because it is equal to n+sod(n) for n = 166420526456497 and 166420526456506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671050509782 + ... + 671050510029.

It is an arithmetic number, because the mean of its divisors is an integer number (25052552369824).

Almost surely, 2^{166420526456564} is an apocalyptic number.

It is an amenable number.

166420526456564 is a deficient number, since it is larger than the sum of its proper divisors (134210101981324).

166420526456564 is a wasteful number, since it uses less digits than its factorization.

166420526456564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342101019846 (or 1342101019844 counting only the distinct ones).

The product of its (nonzero) digits is 248832000, while the sum is 62.

The spelling of 166420526456564 in words is "one hundred sixty-six trillion, four hundred twenty billion, five hundred twenty-six million, four hundred fifty-six thousand, five hundred sixty-four".