666825414775284 has 96 divisors (see below), whose sum is σ = 1595473537158144. Its totient is φ = 216690299320320.

The previous prime is 666825414775279. The next prime is 666825414775309. The reversal of 666825414775284 is 482577414528666.

It is a super-2 number, since 2×666825414775284² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3557769597 + ... + 3557957019.

It is an arithmetic number, because the mean of its divisors is an integer number (16619516012064).

Almost surely, 2^{666825414775284} is an apocalyptic number.

It is an amenable number.

666825414775284 is an abundant number, since it is smaller than the sum of its proper divisors (928648122382860).

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

666825414775284 is a wasteful number, since it uses less digits than its factorization.

666825414775284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230617 (or 230615 counting only the distinct ones).

The product of its digits is 4335206400, while the sum is 75.

The spelling of 666825414775284 in words is "six hundred sixty-six trillion, eight hundred twenty-five billion, four hundred fourteen million, seven hundred seventy-five thousand, two hundred eighty-four".