166685370200 has 48 divisors (see below), whose sum is σ = 391380597360. Its totient is φ = 66014000000.

The previous prime is 166685370193. The next prime is 166685370217. The reversal of 166685370200 is 2073586661.

It is a super-2 number, since 2×166685370200² (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 11 ways as a sum of consecutive naturals, for example, 4105676 + ... + 4146075.

It is an arithmetic number, because the mean of its divisors is an integer number (8153762445).

Almost surely, 2^166685370200 is an apocalyptic number.

166685370200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166685370200 is an abundant number, since it is smaller than the sum of its proper divisors (224695227160).

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

166685370200 is a wasteful number, since it uses less digits than its factorization.

166685370200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8251868 (or 8251859 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 166685370200 in words is "one hundred sixty-six billion, six hundred eighty-five million, three hundred seventy thousand, two hundred".