668886852 has 24 divisors (see below), whose sum is σ = 1561252896. Its totient is φ = 222888448.

The previous prime is 668886839. The next prime is 668886857. The reversal of 668886852 is 258688866.

It is a junction number, because it is equal to n+sod(n) for n = 668886792 and 668886801.

It is not an unprimeable number, because it can be changed into a prime (668886857) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38308 + ... + 52964.

It is an arithmetic number, because the mean of its divisors is an integer number (65052204).

Almost surely, 2^668886852 is an apocalyptic number.

It is an amenable number.

668886852 is an abundant number, since it is smaller than the sum of its proper divisors (892366044).

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

668886852 is a wasteful number, since it uses less digits than its factorization.

668886852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18467 (or 18465 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 57.

The square root of 668886852 is about 25862.8469430571. The cubic root of 668886852 is about 874.5491454730.

The spelling of 668886852 in words is "six hundred sixty-eight million, eight hundred eighty-six thousand, eight hundred fifty-two".