665713080 has 96 divisors (see below), whose sum is σ = 2243732400. Its totient is φ = 177520896.

The previous prime is 665713079. The next prime is 665713093. The reversal of 665713080 is 80317566.

665713080 is a `hidden beast` number, since 6 + 6 + 571 + 3 + 0 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24525 + ... + 43964.

Almost surely, 2^665713080 is an apocalyptic number.

665713080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

665713080 is an abundant number, since it is smaller than the sum of its proper divisors (1578019320).

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

665713080 is a wasteful number, since it uses less digits than its factorization.

665713080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68515 (or 68499 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 665713080 is about 25801.4162401989. The cubic root of 665713080 is about 873.1637486439.

The spelling of 665713080 in words is "six hundred sixty-five million, seven hundred thirteen thousand, eighty".