667899232 has 192 divisors, whose sum is σ = 1828915200. Its totient is φ = 231598080.

The previous prime is 667899209. The next prime is 667899233. The reversal of 667899232 is 232998766.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 667899232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667899233) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 928569 + ... + 929287.

It is an arithmetic number, because the mean of its divisors is an integer number (9525600).

Almost surely, 2^667899232 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 667899232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914457600).

667899232 is an abundant number, since it is smaller than the sum of its proper divisors (1161015968).

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

667899232 is a wasteful number, since it uses less digits than its factorization.

667899232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789 (or 781 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The square root of 667899232 is about 25843.7464776297. The cubic root of 667899232 is about 874.1185057854.

The spelling of 667899232 in words is "six hundred sixty-seven million, eight hundred ninety-nine thousand, two hundred thirty-two".