166228072 has 16 divisors (see below), whose sum is σ = 316330560. Its totient is φ = 81873264.

The previous prime is 166228039. The next prime is 166228099. The reversal of 166228072 is 270822661.

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, 154528 + ... + 155599.

It is an arithmetic number, because the mean of its divisors is an integer number (19770660).

Almost surely, 2^166228072 is an apocalyptic number.

It is an amenable number.

166228072 is a deficient number, since it is larger than the sum of its proper divisors (150102488).

166228072 is a wasteful number, since it uses less digits than its factorization.

166228072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310200 (or 310196 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 166228072 is about 12892.9465988191. The cubic root of 166228072 is about 549.8380481845.

It can be divided in two parts, 1662 and 28072, that multiplied together give a palindrome (46655664).

The spelling of 166228072 in words is "one hundred sixty-six million, two hundred twenty-eight thousand, seventy-two".