66264061925 has 6 divisors (see below), whose sum is σ = 82167436818. Its totient is φ = 53011249520.

The previous prime is 66264061901. The next prime is 66264061987. The reversal of 66264061925 is 52916046266.

It can be written as a sum of positive squares in 3 ways, for example, as 785905156 + 65478156769 = 28034^2 + 255887^2 .

It is not a de Polignac number, because 66264061925 - 2¹⁰ = 66264060901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66264061925.

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, 1325281214 + ... + 1325281263.

It is an arithmetic number, because the mean of its divisors is an integer number (13694572803).

Almost surely, 2^66264061925 is an apocalyptic number.

It is an amenable number.

66264061925 is a deficient number, since it is larger than the sum of its proper divisors (15903374893).

66264061925 is a wasteful number, since it uses less digits than its factorization.

66264061925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650562487 (or 2650562482 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 66264061925 in words is "sixty-six billion, two hundred sixty-four million, sixty-one thousand, nine hundred twenty-five".