666802207675 has 72 divisors (see below), whose sum is σ = 909765052560. Its totient is φ = 484139980800.

The previous prime is 666802207649. The next prime is 666802207691. The reversal of 666802207675 is 576702208666.

It is not a de Polignac number, because 666802207675 - 2⁹ = 666802207163 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 228590317 + ... + 228593233.

It is an arithmetic number, because the mean of its divisors is an integer number (12635625730).

Almost surely, 2^666802207675 is an apocalyptic number.

666802207675 is a deficient number, since it is larger than the sum of its proper divisors (242962844885).

666802207675 is a wasteful number, since it uses less digits than its factorization.

666802207675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081 (or 4059 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 55.

Subtracting from 666802207675 its reverse (576702208666), we obtain a palindrome (90099999009).

The spelling of 666802207675 in words is "six hundred sixty-six billion, eight hundred two million, two hundred seven thousand, six hundred seventy-five".