667520368 has 20 divisors (see below), whose sum is σ = 1369398960. Its totient is φ = 314127104.

The previous prime is 667520363. The next prime is 667520393. The reversal of 667520368 is 863025766.

667520368 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 not an unprimeable number, because it can be changed into a prime (667520363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1226788 + ... + 1227331.

It is an arithmetic number, because the mean of its divisors is an integer number (68469948).

Almost surely, 2^667520368 is an apocalyptic number.

667520368 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

667520368 is an abundant number, since it is smaller than the sum of its proper divisors (701878592).

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

667520368 is a wasteful number, since it uses less digits than its factorization.

667520368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454144 (or 2454138 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 667520368 is about 25836.4155408602. The cubic root of 667520368 is about 873.9531940855.

The spelling of 667520368 in words is "six hundred sixty-seven million, five hundred twenty thousand, three hundred sixty-eight".