666254433625 has 16 divisors (see below), whose sum is σ = 907075128960. Its totient is φ = 484548678000.

The previous prime is 666254433613. The next prime is 666254433629. The reversal of 666254433625 is 526334452666.

It is not a de Polignac number, because 666254433625 - 2²¹ = 666252336473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666254433629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242272965 + ... + 242275714.

It is an arithmetic number, because the mean of its divisors is an integer number (56692195560).

Almost surely, 2^666254433625 is an apocalyptic number.

It is an amenable number.

666254433625 is a deficient number, since it is larger than the sum of its proper divisors (240820695335).

666254433625 is a wasteful number, since it uses less digits than its factorization.

666254433625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484548705 (or 484548695 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 52.

The spelling of 666254433625 in words is "six hundred sixty-six billion, two hundred fifty-four million, four hundred thirty-three thousand, six hundred twenty-five".