664783614768 has 160 divisors (see below), whose sum is σ = 2145219252736. Its totient is φ = 172710641664.

The previous prime is 664783614731. The next prime is 664783614773. The reversal of 664783614768 is 867416387466.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 664783614699 and 664783614708.

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 31 ways as a sum of consecutive naturals, for example, 843121 + ... + 1428432.

Almost surely, 2^664783614768 is an apocalyptic number.

It is an amenable number.

664783614768 is an abundant number, since it is smaller than the sum of its proper divisors (1480435637968).

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

664783614768 is a wasteful number, since it uses less digits than its factorization.

664783614768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271651 (or 2271645 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 66.

The spelling of 664783614768 in words is "six hundred sixty-four billion, seven hundred eighty-three million, six hundred fourteen thousand, seven hundred sixty-eight".