166772028 has 12 divisors (see below), whose sum is σ = 389134760. Its totient is φ = 55590672.

The previous prime is 166772009. The next prime is 166772029. The reversal of 166772028 is 820277661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166772029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6948823 + ... + 6948846.

Almost surely, 2^166772028 is an apocalyptic number.

It is an amenable number.

166772028 is an abundant number, since it is smaller than the sum of its proper divisors (222362732).

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

166772028 is a wasteful number, since it uses less digits than its factorization.

166772028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13897676 (or 13897674 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 166772028 is about 12914.0244695447. The cubic root of 166772028 is about 550.4371488737.

The spelling of 166772028 in words is "one hundred sixty-six million, seven hundred seventy-two thousand, twenty-eight".