668480136 has 32 divisors (see below), whose sum is σ = 1679961600. Its totient is φ = 221658560.

The previous prime is 668480093. The next prime is 668480143. The reversal of 668480136 is 631084866.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68331 + ... + 77498.

It is an arithmetic number, because the mean of its divisors is an integer number (52498800).

Almost surely, 2^668480136 is an apocalyptic number.

It is an amenable number.

668480136 is an abundant number, since it is smaller than the sum of its proper divisors (1011481464).

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

668480136 is a wasteful number, since it uses less digits than its factorization.

668480136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146029 (or 146025 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 668480136 is about 25854.9828079618. The cubic root of 668480136 is about 874.3718532815.

The spelling of 668480136 in words is "six hundred sixty-eight million, four hundred eighty thousand, one hundred thirty-six".