66568652725 has 12 divisors (see below), whose sum is σ = 82548800740. Its totient is φ = 53252553600.

The previous prime is 66568652723. The next prime is 66568652743. The reversal of 66568652725 is 52725686566.

It can be written as a sum of positive squares in 6 ways, for example, as 11105576689 + 55463076036 = 105383^2 + 235506^2 .

It is not a de Polignac number, because 66568652725 - 2¹ = 66568652723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66568652725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66568652723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 710095 + ... + 798355.

Almost surely, 2^66568652725 is an apocalyptic number.

It is an amenable number.

66568652725 is a deficient number, since it is larger than the sum of its proper divisors (15980148015).

66568652725 is a wasteful number, since it uses less digits than its factorization.

66568652725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118440 (or 118435 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 58.

The spelling of 66568652725 in words is "sixty-six billion, five hundred sixty-eight million, six hundred fifty-two thousand, seven hundred twenty-five".