166441772 has 12 divisors (see below), whose sum is σ = 332883600. Its totient is φ = 71332176.

The previous prime is 166441763. The next prime is 166441787. The reversal of 166441772 is 277144661.

It is a happy number.

166441772 is an admirable number.

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, 2972147 + ... + 2972202.

It is an arithmetic number, because the mean of its divisors is an integer number (27740300).

Almost surely, 2^166441772 is an apocalyptic number.

It is an amenable number.

166441772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

166441772 is a wasteful number, since it uses less digits than its factorization.

166441772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5944360 (or 5944358 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 166441772 is about 12901.2314140938. The cubic root of 166441772 is about 550.0735681205.

The spelling of 166441772 in words is "one hundred sixty-six million, four hundred forty-one thousand, seven hundred seventy-two".