166204644 has 12 divisors (see below), whose sum is σ = 387810864. Its totient is φ = 55401544.

The previous prime is 166204627. The next prime is 166204667. The reversal of 166204644 is 446402661.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6925182 + ... + 6925205.

It is an arithmetic number, because the mean of its divisors is an integer number (32317572).

Almost surely, 2^166204644 is an apocalyptic number.

It is an amenable number.

166204644 is an abundant number, since it is smaller than the sum of its proper divisors (221606220).

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

166204644 is a wasteful number, since it uses less digits than its factorization.

166204644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13850394 (or 13850392 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 166204644 is about 12892.0380080110. The cubic root of 166204644 is about 549.8122157827.

The spelling of 166204644 in words is "one hundred sixty-six million, two hundred four thousand, six hundred forty-four".