662717767680 has 336 divisors, whose sum is σ = 2318497913160. Its totient is φ = 175092793344.

The previous prime is 662717767643. The next prime is 662717767783. The reversal of 662717767680 is 86767717266.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 405595754496 + 257122013184 = 636864^2 + 507072^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40173514 + ... + 40190006.

Almost surely, 2^662717767680 is an apocalyptic number.

662717767680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 662717767680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159248956580).

662717767680 is an abundant number, since it is smaller than the sum of its proper divisors (1655780145480).

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

662717767680 is a wasteful number, since it uses less digits than its factorization.

662717767680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16639 (or 16612 counting only the distinct ones).

The product of its (nonzero) digits is 49787136, while the sum is 63.

The spelling of 662717767680 in words is "six hundred sixty-two billion, seven hundred seventeen million, seven hundred sixty-seven thousand, six hundred eighty".