172666892381560 has 64 divisors (see below), whose sum is σ = 393954030529920. Its totient is φ = 68102496645120.

The previous prime is 172666892381539. The next prime is 172666892381567. The reversal of 172666892381560 is 65183298666271.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 172666892381560.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172666892381567) 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, 81055119 + ... + 83158078.

It is an arithmetic number, because the mean of its divisors is an integer number (6155531727030).

Almost surely, 2^{172666892381560} is an apocalyptic number.

172666892381560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172666892381560 is an abundant number, since it is smaller than the sum of its proper divisors (221287138148360).

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

172666892381560 is a wasteful number, since it uses less digits than its factorization.

172666892381560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164213576 (or 164213572 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 70.

The spelling of 172666892381560 in words is "one hundred seventy-two trillion, six hundred sixty-six billion, eight hundred ninety-two million, three hundred eighty-one thousand, five hundred sixty".