166688447608776 has 64 divisors (see below), whose sum is σ = 418486548729600. Its totient is φ = 55327449497600.

The previous prime is 166688447608741. The next prime is 166688447608799. The reversal of 166688447608776 is 677806744886661.

It is a super-2 number, since 2×166688447608776² (a number of 29 digits) contains 22 as substring.

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, 110650696 + ... + 112147016.

It is an arithmetic number, because the mean of its divisors is an integer number (6538852323900).

Almost surely, 2^{166688447608776} is an apocalyptic number.

It is an amenable number.

166688447608776 is an abundant number, since it is smaller than the sum of its proper divisors (251798101120824).

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

166688447608776 is a wasteful number, since it uses less digits than its factorization.

166688447608776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515990 (or 1515986 counting only the distinct ones).

The product of its (nonzero) digits is 21849440256, while the sum is 84.

The spelling of 166688447608776 in words is "one hundred sixty-six trillion, six hundred eighty-eight billion, four hundred forty-seven million, six hundred eight thousand, seven hundred seventy-six".