668875392 has 96 divisors (see below), whose sum is σ = 2026128000. Its totient is φ = 211216896.

The previous prime is 668875391. The next prime is 668875393. The reversal of 668875392 is 293578866.

It is a happy number.

668875392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (668875391) and next prime (668875393).

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (668875391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6609 + ... + 37167.

It is an arithmetic number, because the mean of its divisors is an integer number (21105500).

Almost surely, 2^668875392 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 668875392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1013064000).

668875392 is an abundant number, since it is smaller than the sum of its proper divisors (1357252608).

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

668875392 is a wasteful number, since it uses less digits than its factorization.

668875392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30598 (or 30583 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 668875392 is about 25862.6253887729. The cubic root of 668875392 is about 874.5441509111.

The spelling of 668875392 in words is "six hundred sixty-eight million, eight hundred seventy-five thousand, three hundred ninety-two".