166231054651564 has 48 divisors (see below), whose sum is σ = 332852962256640. Its totient is φ = 71158144368960.

The previous prime is 166231054651561. The next prime is 166231054651601. The reversal of 166231054651564 is 465156450132661.

It is a super-2 number, since 2×166231054651564² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166231054651561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223981407 + ... + 224722345.

It is an arithmetic number, because the mean of its divisors is an integer number (6934436713680).

Almost surely, 2^{166231054651564} is an apocalyptic number.

166231054651564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166231054651564 is an abundant number, since it is smaller than the sum of its proper divisors (166621907605076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166231054651564 is a wasteful number, since it uses less digits than its factorization.

166231054651564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750358 (or 750356 counting only the distinct ones).

The product of its (nonzero) digits is 15552000, while the sum is 55.

The spelling of 166231054651564 in words is "one hundred sixty-six trillion, two hundred thirty-one billion, fifty-four million, six hundred fifty-one thousand, five hundred sixty-four".