166506672 has 20 divisors (see below), whose sum is σ = 430142360. Its totient is φ = 55502208.

The previous prime is 166506647. The next prime is 166506679. The reversal of 166506672 is 276605661.

It is a self number, because there is not a number n which added to its sum of digits gives 166506672.

It is not an unprimeable number, because it can be changed into a prime (166506679) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1734397 + ... + 1734492.

It is an arithmetic number, because the mean of its divisors is an integer number (21507118).

Almost surely, 2^166506672 is an apocalyptic number.

166506672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166506672 is an abundant number, since it is smaller than the sum of its proper divisors (263635688).

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

166506672 is a wasteful number, since it uses less digits than its factorization.

166506672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468900 (or 3468894 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 166506672 is about 12903.7464327226. The cubic root of 166506672 is about 550.1450548534.

The spelling of 166506672 in words is "one hundred sixty-six million, five hundred six thousand, six hundred seventy-two".