665056125 has 24 divisors (see below), whose sum is σ = 1198876536. Its totient is φ = 354696000.

The previous prime is 665056097. The next prime is 665056127. The reversal of 665056125 is 521650566.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16793604 + 648262521 = 4098^2 + 25461^2 .

It is not a de Polignac number, because 665056125 - 2¹² = 665052029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665056125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665056127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 294456 + ... + 296705.

It is an arithmetic number, because the mean of its divisors is an integer number (49953189).

Almost surely, 2^665056125 is an apocalyptic number.

It is an amenable number.

665056125 is a deficient number, since it is larger than the sum of its proper divisors (533820411).

665056125 is a wasteful number, since it uses less digits than its factorization.

665056125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591182 (or 591169 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 665056125 is about 25788.6821105694. The cubic root of 665056125 is about 872.8764286230.

The spelling of 665056125 in words is "six hundred sixty-five million, fifty-six thousand, one hundred twenty-five".