668615260 has 24 divisors (see below), whose sum is σ = 1404597600. Its totient is φ = 267349824.

The previous prime is 668615257. The next prime is 668615273. The reversal of 668615260 is 62516866.

668615260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83137 + ... + 90823.

It is an arithmetic number, because the mean of its divisors is an integer number (58524900).

Almost surely, 2^668615260 is an apocalyptic number.

It is an amenable number.

668615260 is an abundant number, since it is smaller than the sum of its proper divisors (735982340).

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

668615260 is a wasteful number, since it uses less digits than its factorization.

668615260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12045 (or 12043 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 668615260 is about 25857.5957892454. The cubic root of 668615260 is about 874.4307633654.

The spelling of 668615260 in words is "six hundred sixty-eight million, six hundred fifteen thousand, two hundred sixty".