668887400 has 48 divisors (see below), whose sum is σ = 1637023200. Its totient is φ = 253471680.

The previous prime is 668887399. The next prime is 668887451. The reversal of 668887400 is 4788866.

It is a happy number.

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 11 ways as a sum of consecutive naturals, for example, 84212 + ... + 91811.

It is an arithmetic number, because the mean of its divisors is an integer number (34104650).

Almost surely, 2^668887400 is an apocalyptic number.

It is an amenable number.

668887400 is an abundant number, since it is smaller than the sum of its proper divisors (968135800).

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

668887400 is a wasteful number, since it uses less digits than its factorization.

668887400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176058 (or 176049 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 668887400 is about 25862.8575374029. The cubic root of 668887400 is about 874.5493843041.

The spelling of 668887400 in words is "six hundred sixty-eight million, eight hundred eighty-seven thousand, four hundred".