666343526520 has 96 divisors (see below), whose sum is σ = 2325402939600. Its totient is φ = 152307090432.

The previous prime is 666343526503. The next prime is 666343526531. The reversal of 666343526520 is 25625343666.

It is a happy number.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 666343526520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56655985 + ... + 56667744.

Almost surely, 2^666343526520 is an apocalyptic number.

666343526520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666343526520 is an abundant number, since it is smaller than the sum of its proper divisors (1659059413080).

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

666343526520 is a wasteful number, since it uses less digits than its factorization.

666343526520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113323757 (or 113323746 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 48.

The spelling of 666343526520 in words is "six hundred sixty-six billion, three hundred forty-three million, five hundred twenty-six thousand, five hundred twenty".