166145572 has 12 divisors (see below), whose sum is σ = 290851456. Its totient is φ = 83045160.

The previous prime is 166145569. The next prime is 166145599. The reversal of 166145572 is 275541661.

It is a happy number.

166145572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 12997 + ... + 22387.

Almost surely, 2^166145572 is an apocalyptic number.

It is an amenable number.

166145572 is a deficient number, since it is larger than the sum of its proper divisors (124705884).

166145572 is a wasteful number, since it uses less digits than its factorization.

166145572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13818 (or 13816 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 166145572 is about 12889.7467779627. The cubic root of 166145572 is about 549.7470704795.

The spelling of 166145572 in words is "one hundred sixty-six million, one hundred forty-five thousand, five hundred seventy-two".