667297392 has 80 divisors (see below), whose sum is σ = 1771934208. Its totient is φ = 216276480.

The previous prime is 667297369. The next prime is 667297403. The reversal of 667297392 is 293792766.

Its product of digits (1714608) is a multiple of the sum of its prime divisors (1512).

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, 558748 + ... + 559940.

Almost surely, 2^667297392 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 667297392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (885967104).

667297392 is an abundant number, since it is smaller than the sum of its proper divisors (1104636816).

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

667297392 is a wasteful number, since it uses less digits than its factorization.

667297392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1512 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 51.

The square root of 667297392 is about 25832.1000307757. The cubic root of 667297392 is about 873.8558725661.

The spelling of 667297392 in words is "six hundred sixty-seven million, two hundred ninety-seven thousand, three hundred ninety-two".