668858480 has 40 divisors (see below), whose sum is σ = 1605266304. Its totient is φ = 258912000.

The previous prime is 668858479. The next prime is 668858497. The reversal of 668858480 is 84858866.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 132371 + ... + 137330.

Almost surely, 2^668858480 is an apocalyptic number.

It is an amenable number.

668858480 is an abundant number, since it is smaller than the sum of its proper divisors (936407824).

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

668858480 is a wasteful number, since it uses less digits than its factorization.

668858480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269745 (or 269739 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 53.

The square root of 668858480 is about 25862.2984284073. The cubic root of 668858480 is about 874.5367801235.

The spelling of 668858480 in words is "six hundred sixty-eight million, eight hundred fifty-eight thousand, four hundred eighty".