666324125 has 16 divisors (see below), whose sum is σ = 832606320. Its totient is φ = 532396800.

The previous prime is 666324119. The next prime is 666324187. The reversal of 666324125 is 521423666.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 209989081 + 456335044 = 14491^2 + 21362^2 .

It is not a de Polignac number, because 666324125 - 2¹² = 666320029 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114281 + ... + 119969.

It is an arithmetic number, because the mean of its divisors is an integer number (52037895).

Almost surely, 2^666324125 is an apocalyptic number.

It is an amenable number.

666324125 is a deficient number, since it is larger than the sum of its proper divisors (166282195).

666324125 is an equidigital number, since it uses as much as digits as its factorization.

666324125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6641 (or 6631 counting only the distinct ones).

The product of its digits is 51840, while the sum is 35.

The square root of 666324125 is about 25813.2548315783. The cubic root of 666324125 is about 873.4308202495.

The spelling of 666324125 in words is "six hundred sixty-six million, three hundred twenty-four thousand, one hundred twenty-five".