668455610 has 32 divisors (see below), whose sum is σ = 1235699712. Its totient is φ = 260245440.

The previous prime is 668455607. The next prime is 668455621. The reversal of 668455610 is 16554866.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62345 + ... + 72275.

It is an arithmetic number, because the mean of its divisors is an integer number (38615616).

Almost surely, 2^668455610 is an apocalyptic number.

668455610 is a deficient number, since it is larger than the sum of its proper divisors (567244102).

668455610 is a wasteful number, since it uses less digits than its factorization.

668455610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10118.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 668455610 is about 25854.5085043209. The cubic root of 668455610 is about 874.3611598168.

The spelling of 668455610 in words is "six hundred sixty-eight million, four hundred fifty-five thousand, six hundred ten".