166426560 has 84 divisors (see below), whose sum is σ = 572447928. Its totient is φ = 44379648.

The previous prime is 166426553. The next prime is 166426571. The reversal of 166426560 is 65624661.

It is a happy number.

166426560 is a `hidden beast` number, since 1 + 6 + 642 + 6 + 5 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 26014 + ... + 31773.

Almost surely, 2^166426560 is an apocalyptic number.

166426560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166426560 is an abundant number, since it is smaller than the sum of its proper divisors (406021368).

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

166426560 is a wasteful number, since it uses less digits than its factorization.

166426560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57810 (or 57797 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 166426560 is about 12900.6418444975. The cubic root of 166426560 is about 550.0568095589.

It can be divided in two parts, 1664 and 26560, that added together give a square (28224 = 168²).

The spelling of 166426560 in words is "one hundred sixty-six million, four hundred twenty-six thousand, five hundred sixty".