166645615560 has 128 divisors (see below), whose sum is σ = 501976258560. Its totient is φ = 44257939200.

The previous prime is 166645615537. The next prime is 166645615567. The reversal of 166645615560 is 65516546661.

166645615560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166645615560² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166645615567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33253455 + ... + 33258465.

It is an arithmetic number, because the mean of its divisors is an integer number (3921689520).

Almost surely, 2^166645615560 is an apocalyptic number.

166645615560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166645615560 is an abundant number, since it is smaller than the sum of its proper divisors (335330643000).

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

166645615560 is a wasteful number, since it uses less digits than its factorization.

166645615560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6099 (or 6095 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 166645615560 in words is "one hundred sixty-six billion, six hundred forty-five million, six hundred fifteen thousand, five hundred sixty".