668253984 has 48 divisors (see below), whose sum is σ = 1757246400. Its totient is φ = 222360320.

The previous prime is 668253977. The next prime is 668254033. The reversal of 668253984 is 489352866.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51694 + ... + 63314.

It is an arithmetic number, because the mean of its divisors is an integer number (36609300).

Almost surely, 2^668253984 is an apocalyptic number.

It is an amenable number.

668253984 is an abundant number, since it is smaller than the sum of its proper divisors (1088992416).

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

668253984 is a wasteful number, since it uses less digits than its factorization.

668253984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12233 (or 12225 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 51.

The square root of 668253984 is about 25850.6089676820. The cubic root of 668253984 is about 874.2732399067.

The spelling of 668253984 in words is "six hundred sixty-eight million, two hundred fifty-three thousand, nine hundred eighty-four".