665155576760 has 32 divisors (see below), whose sum is σ = 1498024119600. Its totient is φ = 265809062400.

The previous prime is 665155576703. The next prime is 665155576901. The reversal of 665155576760 is 67675551566.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 665155576760.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7868945 + ... + 7953024.

Almost surely, 2^665155576760 is an apocalyptic number.

It is an amenable number.

665155576760 is an abundant number, since it is smaller than the sum of its proper divisors (832868542840).

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

665155576760 is a wasteful number, since it uses less digits than its factorization.

665155576760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15823031 (or 15823027 counting only the distinct ones).

The product of its (nonzero) digits is 39690000, while the sum is 59.

The spelling of 665155576760 in words is "six hundred sixty-five billion, one hundred fifty-five million, five hundred seventy-six thousand, seven hundred sixty".