666032172750 has 128 divisors (see below), whose sum is σ = 2111004979200. Its totient is φ = 152235914400.

The previous prime is 666032172731. The next prime is 666032172779. The reversal of 666032172750 is 57271230666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 666032172696 and 666032172705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7000710 + ... + 7095209.

It is an arithmetic number, because the mean of its divisors is an integer number (16492226400).

Almost surely, 2^666032172750 is an apocalyptic number.

666032172750 is an abundant number, since it is smaller than the sum of its proper divisors (1444972806450).

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

666032172750 is a wasteful number, since it uses less digits than its factorization.

666032172750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14095952 (or 14095936 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 666032172750 in words is "six hundred sixty-six billion, thirty-two million, one hundred seventy-two thousand, seven hundred fifty".