66669152146525 has 6 divisors (see below), whose sum is σ = 82669748661722. Its totient is φ = 53335321717200.

The previous prime is 66669152146511. The next prime is 66669152146589. The reversal of 66669152146525 is 52564125196666.

It is a happy number.

66669152146525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 347641131321 + 66321511015204 = 589611^2 + 8143802^2 .

It is a de Polignac number, because none of the positive numbers 2^k-66669152146525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1333383042906 + ... + 1333383042955.

Almost surely, 2^{66669152146525} is an apocalyptic number.

It is an amenable number.

66669152146525 is a deficient number, since it is larger than the sum of its proper divisors (16000596515197).

66669152146525 is a wasteful number, since it uses less digits than its factorization.

66669152146525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666766085871 (or 2666766085866 counting only the distinct ones).

The product of its digits is 139968000, while the sum is 64.

The spelling of 66669152146525 in words is "sixty-six trillion, six hundred sixty-nine billion, one hundred fifty-two million, one hundred forty-six thousand, five hundred twenty-five".