668324652 has 12 divisors (see below), whose sum is σ = 1559424216. Its totient is φ = 222774880.

The previous prime is 668324627. The next prime is 668324711. The reversal of 668324652 is 256423866.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×668324652² = 893315680941842208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27846849 + ... + 27846872.

It is an arithmetic number, because the mean of its divisors is an integer number (129952018).

Almost surely, 2^668324652 is an apocalyptic number.

It is an amenable number.

668324652 is an abundant number, since it is smaller than the sum of its proper divisors (891099564).

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

668324652 is a wasteful number, since it uses less digits than its factorization.

668324652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55693728 (or 55693726 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The square root of 668324652 is about 25851.9757852277. The cubic root of 668324652 is about 874.3040570137.

The spelling of 668324652 in words is "six hundred sixty-eight million, three hundred twenty-four thousand, six hundred fifty-two".