669713537280 has 72 divisors (see below), whose sum is σ = 2138897621952. Its totient is φ = 178590275584.

The previous prime is 669713537257. The next prime is 669713537293. The reversal of 669713537280 is 82735317966.

It is a self number, because there is not a number n which added to its sum of digits gives 669713537280.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87198444 + ... + 87206123.

It is an arithmetic number, because the mean of its divisors is an integer number (29706911416).

Almost surely, 2^669713537280 is an apocalyptic number.

669713537280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

669713537280 is an abundant number, since it is smaller than the sum of its proper divisors (1469184084672).

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

669713537280 is a wasteful number, since it uses less digits than its factorization.

669713537280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174404591 (or 174404577 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 57.

The spelling of 669713537280 in words is "six hundred sixty-nine billion, seven hundred thirteen million, five hundred thirty-seven thousand, two hundred eighty".