166056056840 has 32 divisors (see below), whose sum is σ = 379751151960. Its totient is φ = 65333529600.

The previous prime is 166056056821. The next prime is 166056056879. The reversal of 166056056840 is 48650650661.

It can be written as a sum of positive squares in 4 ways, for example, as 84400708324 + 81655348516 = 290518^2 + 285754^2 .

It is a super-2 number, since 2×166056056840² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34025441 + ... + 34030320.

Almost surely, 2^166056056840 is an apocalyptic number.

166056056840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166056056840 is an abundant number, since it is smaller than the sum of its proper divisors (213695095120).

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

166056056840 is a wasteful number, since it uses less digits than its factorization.

166056056840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68055833 (or 68055829 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 166056056840 in words is "one hundred sixty-six billion, fifty-six million, fifty-six thousand, eight hundred forty".