166555645544100 has 72 divisors (see below), whose sum is σ = 482018742506560. Its totient is φ = 44403987070080.

The previous prime is 166555645544087. The next prime is 166555645544129. The reversal of 166555645544100 is 1445546555661.

It is a super-2 number, since 2×166555645544100² (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 23 ways as a sum of consecutive naturals, for example, 66593440 + ... + 69049239.

Almost surely, 2^{166555645544100} is an apocalyptic number.

166555645544100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166555645544100 is an abundant number, since it is smaller than the sum of its proper divisors (315463096962460).

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

166555645544100 is a wasteful number, since it uses less digits than its factorization.

166555645544100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135646789 (or 135646782 counting only the distinct ones).

The product of its (nonzero) digits is 43200000, while the sum is 57.

The spelling of 166555645544100 in words is "one hundred sixty-six trillion, five hundred fifty-five billion, six hundred forty-five million, five hundred forty-four thousand, one hundred".