166971726972 has 48 divisors (see below), whose sum is σ = 432920185600. Its totient is φ = 55653318000.

The previous prime is 166971726959. The next prime is 166971727001. The reversal of 166971726972 is 279627179661.

It is a super-2 number, since 2×166971726972² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1763847 + ... + 1856097.

Almost surely, 2^166971726972 is an apocalyptic number.

166971726972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166971726972 is an abundant number, since it is smaller than the sum of its proper divisors (265948458628).

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

166971726972 is a wasteful number, since it uses less digits than its factorization.

166971726972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109023 (or 109015 counting only the distinct ones).

The product of its digits is 24004512, while the sum is 63.

The spelling of 166971726972 in words is "one hundred sixty-six billion, nine hundred seventy-one million, seven hundred twenty-six thousand, nine hundred seventy-two".