667395872 has 96 divisors (see below), whose sum is σ = 1554577920. Its totient is φ = 279701760.

The previous prime is 667395863. The next prime is 667395907. The reversal of 667395872 is 278593766.

667395872 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 15 ways as a sum of consecutive naturals, for example, 772913 + ... + 773775.

It is an arithmetic number, because the mean of its divisors is an integer number (16193520).

Almost surely, 2^667395872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667395872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777288960).

667395872 is an abundant number, since it is smaller than the sum of its proper divisors (887182048).

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

667395872 is a wasteful number, since it uses less digits than its factorization.

667395872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 889 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 53.

The square root of 667395872 is about 25834.0061159705. The cubic root of 667395872 is about 873.8988584443.

The spelling of 667395872 in words is "six hundred sixty-seven million, three hundred ninety-five thousand, eight hundred seventy-two".