668276520 has 32 divisors (see below), whose sum is σ = 2004829920. Its totient is φ = 178207040.

The previous prime is 668276519. The next prime is 668276537. The reversal of 668276520 is 25672866.

668276520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2784366 + ... + 2784605.

It is an arithmetic number, because the mean of its divisors is an integer number (62650935).

Almost surely, 2^668276520 is an apocalyptic number.

668276520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

668276520 is an abundant number, since it is smaller than the sum of its proper divisors (1336553400).

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

668276520 is a wasteful number, since it uses less digits than its factorization.

668276520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5568985 (or 5568981 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 668276520 is about 25851.0448531583. The cubic root of 668276520 is about 874.2830677071.

The spelling of 668276520 in words is "six hundred sixty-eight million, two hundred seventy-six thousand, five hundred twenty".