665880858606375 has 48 divisors (see below), whose sum is σ = 1229638330982880. Its totient is φ = 346474593072000.

The previous prime is 665880858606307. The next prime is 665880858606407. The reversal of 665880858606375 is 573606858088566.

665880858606375 is a `hidden beast` number, since 6 + 65 + 8 + 80 + 8 + 58 + 60 + 6 + 375 = 666.

It is not a de Polignac number, because 665880858606375 - 2¹³ = 665880858598183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665880858606294 and 665880858606303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7218174565 + ... + 7218266814.

It is an arithmetic number, because the mean of its divisors is an integer number (25617465228810).

Almost surely, 2^{665880858606375} is an apocalyptic number.

665880858606375 is a deficient number, since it is larger than the sum of its proper divisors (563757472376505).

665880858606375 is a wasteful number, since it uses less digits than its factorization.

665880858606375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14436441441 (or 14436441428 counting only the distinct ones).

The product of its (nonzero) digits is 13934592000, while the sum is 81.

The spelling of 665880858606375 in words is "six hundred sixty-five trillion, eight hundred eighty billion, eight hundred fifty-eight million, six hundred six thousand, three hundred seventy-five".