664841884260 has 48 divisors (see below), whose sum is σ = 1861903745856. Its totient is φ = 177258172032.

The previous prime is 664841884249. The next prime is 664841884277. The reversal of 664841884260 is 62488148466.

It is a self number, because there is not a number n which added to its sum of digits gives 664841884260.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705247 + ... + 1351686.

It is an arithmetic number, because the mean of its divisors is an integer number (38789661372).

Almost surely, 2^664841884260 is an apocalyptic number.

664841884260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

664841884260 is an abundant number, since it is smaller than the sum of its proper divisors (1197061861596).

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

664841884260 is a wasteful number, since it uses less digits than its factorization.

664841884260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062332 (or 2062330 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 57.

The spelling of 664841884260 in words is "six hundred sixty-four billion, eight hundred forty-one million, eight hundred eighty-four thousand, two hundred sixty".