166572438 has 16 divisors (see below), whose sum is σ = 335769600. Its totient is φ = 55086696.

The previous prime is 166572431. The next prime is 166572493. The reversal of 166572438 is 834275661.

It is a self number, because there is not a number n which added to its sum of digits gives 166572438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166572431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108538 + ... + 110061.

It is an arithmetic number, because the mean of its divisors is an integer number (20985600).

Almost surely, 2^166572438 is an apocalyptic number.

166572438 is an abundant number, since it is smaller than the sum of its proper divisors (169197162).

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

166572438 is a wasteful number, since it uses less digits than its factorization.

166572438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218731.

The product of its digits is 241920, while the sum is 42.

The square root of 166572438 is about 12906.2945108191. The cubic root of 166572438 is about 550.2174765303.

The spelling of 166572438 in words is "one hundred sixty-six million, five hundred seventy-two thousand, four hundred thirty-eight".