665126254725 has 24 divisors (see below), whose sum is σ = 1102546670592. Its totient is φ = 353807788800.

The previous prime is 665126254693. The next prime is 665126254729. The reversal of 665126254725 is 527452621566.

665126254725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665126254725 - 2⁵ = 665126254693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665126254729) 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, 11548756 + ... + 11606205.

It is an arithmetic number, because the mean of its divisors is an integer number (45939444608).

Almost surely, 2^665126254725 is an apocalyptic number.

It is an amenable number.

665126254725 is a deficient number, since it is larger than the sum of its proper divisors (437420415867).

665126254725 is a wasteful number, since it uses less digits than its factorization.

665126254725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23155357 (or 23155352 counting only the distinct ones).

The product of its digits is 6048000, while the sum is 51.

The spelling of 665126254725 in words is "six hundred sixty-five billion, one hundred twenty-six million, two hundred fifty-four thousand, seven hundred twenty-five".