166641560 has 32 divisors (see below), whose sum is σ = 375548400. Its totient is φ = 66549120.

The previous prime is 166641551. The next prime is 166641581. The reversal of 166641560 is 65146661.

It is a self number, because there is not a number n which added to its sum of digits gives 166641560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24626 + ... + 30654.

Almost surely, 2^166641560 is an apocalyptic number.

166641560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166641560 is an abundant number, since it is smaller than the sum of its proper divisors (208906840).

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

166641560 is a wasteful number, since it uses less digits than its factorization.

166641560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6731 (or 6727 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 166641560 is about 12908.9720737168. The cubic root of 166641560 is about 550.2935732992.

The spelling of 166641560 in words is "one hundred sixty-six million, six hundred forty-one thousand, five hundred sixty".