666758811433420 has 48 divisors (see below), whose sum is σ = 1413284888887200. Its totient is φ = 264209946729984.

The previous prime is 666758811433417. The next prime is 666758811433469. The reversal of 666758811433420 is 24334118857666.

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, 804219256 + ... + 805047904.

It is an arithmetic number, because the mean of its divisors is an integer number (29443435185150).

Almost surely, 2^{666758811433420} is an apocalyptic number.

It is an amenable number.

666758811433420 is an abundant number, since it is smaller than the sum of its proper divisors (746526077453780).

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

666758811433420 is a wasteful number, since it uses less digits than its factorization.

666758811433420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204762 (or 1204760 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 64.

The spelling of 666758811433420 in words is "six hundred sixty-six trillion, seven hundred fifty-eight billion, eight hundred eleven million, four hundred thirty-three thousand, four hundred twenty".