166144772 has 24 divisors (see below), whose sum is σ = 293333376. Its totient is φ = 82339488.

The previous prime is 166144753. The next prime is 166144789. The reversal of 166144772 is 277441661.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358613 + ... + 359075.

It is an arithmetic number, because the mean of its divisors is an integer number (12222224).

Almost surely, 2^166144772 is an apocalyptic number.

It is an amenable number.

166144772 is a deficient number, since it is larger than the sum of its proper divisors (127188604).

166144772 is a wasteful number, since it uses less digits than its factorization.

166144772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067 (or 1065 counting only the distinct ones).

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

The square root of 166144772 is about 12889.7157455081. The cubic root of 166144772 is about 549.7461881241.

The spelling of 166144772 in words is "one hundred sixty-six million, one hundred forty-four thousand, seven hundred seventy-two".