667635040 has 24 divisors (see below), whose sum is σ = 1577288160. Its totient is φ = 267053952.

The previous prime is 667635029. The next prime is 667635041. The reversal of 667635040 is 40536766.

667635040 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 (667635041) 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, 2086200 + ... + 2086519.

It is an arithmetic number, because the mean of its divisors is an integer number (65720340).

Almost surely, 2^667635040 is an apocalyptic number.

It is an amenable number.

667635040 is an abundant number, since it is smaller than the sum of its proper divisors (909653120).

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

667635040 is a wasteful number, since it uses less digits than its factorization.

667635040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4172734 (or 4172726 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 667635040 is about 25838.6346388504. The cubic root of 667635040 is about 874.0032361153.

The spelling of 667635040 in words is "six hundred sixty-seven million, six hundred thirty-five thousand, forty".