666064125 has 24 divisors (see below), whose sum is σ = 1200693624. Its totient is φ = 355233600.

The previous prime is 666064103. The next prime is 666064151. The reversal of 666064125 is 521460666.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 169754841 + 496309284 = 13029^2 + 22278^2 .

It is not a de Polignac number, because 666064125 - 2⁵ = 666064093 is a prime.

It is a super-2 number, since 2×666064125² = 887282837224031250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 666064125.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 294904 + ... + 297153.

It is an arithmetic number, because the mean of its divisors is an integer number (50028901).

Almost surely, 2^666064125 is an apocalyptic number.

It is an amenable number.

666064125 is a deficient number, since it is larger than the sum of its proper divisors (534629499).

666064125 is a wasteful number, since it uses less digits than its factorization.

666064125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592078 (or 592065 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 666064125 is about 25808.2181678627. The cubic root of 666064125 is about 873.3172010921.

It can be divided in two parts, 6660641 and 25, that added together give a palindrome (6660666).

The spelling of 666064125 in words is "six hundred sixty-six million, sixty-four thousand, one hundred twenty-five".