166025406 has 64 divisors (see below), whose sum is σ = 354585600. Its totient is φ = 51744000.

The previous prime is 166025399. The next prime is 166025411. The reversal of 166025406 is 604520661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1099431 + ... + 1099581.

It is an arithmetic number, because the mean of its divisors is an integer number (5540400).

Almost surely, 2^166025406 is an apocalyptic number.

166025406 is an abundant number, since it is smaller than the sum of its proper divisors (188560194).

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

166025406 is a wasteful number, since it uses less digits than its factorization.

166025406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 166025406 is about 12885.0846330166. The cubic root of 166025406 is about 549.6145023177.

The spelling of 166025406 in words is "one hundred sixty-six million, twenty-five thousand, four hundred six".