166712872 has 8 divisors (see below), whose sum is σ = 312586650. Its totient is φ = 83356432.

The previous prime is 166712869. The next prime is 166712881. The reversal of 166712872 is 278217661.

166712872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 105966436 + 60746436 = 10294^2 + 7794^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10419547 + ... + 10419562.

Almost surely, 2^166712872 is an apocalyptic number.

It is an amenable number.

166712872 is a deficient number, since it is larger than the sum of its proper divisors (145873778).

166712872 is a wasteful number, since it uses less digits than its factorization.

166712872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20839115 (or 20839111 counting only the distinct ones).

The product of its digits is 56448, while the sum is 40.

The square root of 166712872 is about 12911.7338882119. The cubic root of 166712872 is about 550.3720590000.

The spelling of 166712872 in words is "one hundred sixty-six million, seven hundred twelve thousand, eight hundred seventy-two".