668683510 has 48 divisors (see below), whose sum is σ = 1348090128. Its totient is φ = 238546880.

The previous prime is 668683493. The next prime is 668683591. The reversal of 668683510 is 15386866.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 58917 + ... + 69343.

It is an arithmetic number, because the mean of its divisors is an integer number (28085211).

Almost surely, 2^668683510 is an apocalyptic number.

668683510 is an abundant number, since it is smaller than the sum of its proper divisors (679406618).

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

668683510 is a wasteful number, since it uses less digits than its factorization.

668683510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10509 (or 10498 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 668683510 is about 25858.9154838327. The cubic root of 668683510 is about 874.4605153381.

The spelling of 668683510 in words is "six hundred sixty-eight million, six hundred eighty-three thousand, five hundred ten".