166645412 has 24 divisors (see below), whose sum is σ = 298439232. Its totient is φ = 81396000.

The previous prime is 166645403. The next prime is 166645417. The reversal of 166645412 is 214546661.

It is not an unprimeable number, because it can be changed into a prime (166645417) 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, 34583 + ... + 39105.

It is an arithmetic number, because the mean of its divisors is an integer number (12434968).

Almost surely, 2^166645412 is an apocalyptic number.

It is an amenable number.

166645412 is a deficient number, since it is larger than the sum of its proper divisors (131793820).

166645412 is a wasteful number, since it uses less digits than its factorization.

166645412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4739 (or 4737 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 166645412 is about 12909.1212714112. The cubic root of 166645412 is about 550.2978133669.

The spelling of 166645412 in words is "one hundred sixty-six million, six hundred forty-five thousand, four hundred twelve".