166608776840 has 64 divisors (see below), whose sum is σ = 412328689920. Its totient is φ = 60584990400.

The previous prime is 166608776839. The next prime is 166608776843. The reversal of 166608776840 is 48677806661.

It is a self number, because there is not a number n which added to its sum of digits gives 166608776840.

It is not an unprimeable number, because it can be changed into a prime (166608776843) 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, 1511456 + ... + 1617935.

It is an arithmetic number, because the mean of its divisors is an integer number (6442635780).

Almost surely, 2^166608776840 is an apocalyptic number.

166608776840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166608776840 is an abundant number, since it is smaller than the sum of its proper divisors (245719913080).

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

166608776840 is a wasteful number, since it uses less digits than its factorization.

166608776840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129435 (or 3129409 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 59.

The spelling of 166608776840 in words is "one hundred sixty-six billion, six hundred eight million, seven hundred seventy-six thousand, eight hundred forty".