166668552 has 24 divisors (see below), whose sum is σ = 451394190. Its totient is φ = 55556160.

The previous prime is 166668497. The next prime is 166668553. The reversal of 166668552 is 255866661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 144144036 + 22524516 = 12006^2 + 4746^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 166668498 and 166668507.

It is not an unprimeable number, because it can be changed into a prime (166668553) 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 5 ways as a sum of consecutive naturals, for example, 1157349 + ... + 1157492.

Almost surely, 2^166668552 is an apocalyptic number.

166668552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166668552 is an abundant number, since it is smaller than the sum of its proper divisors (284725638).

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

166668552 is a wasteful number, since it uses less digits than its factorization.

166668552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2314853 (or 2314846 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 166668552 is about 12910.0175057976. The cubic root of 166668552 is about 550.3232832191.

The spelling of 166668552 in words is "one hundred sixty-six million, six hundred sixty-eight thousand, five hundred fifty-two".