65886257191225 has 27 divisors (see below), whose sum is σ = 82199559547821. Its totient is φ = 52387993252800.

The previous prime is 65886257191207. The next prime is 65886257191247. The reversal of 65886257191225 is 52219175268856.

The square root of 65886257191225 is 8117035.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 31886022726441 + 34000234464784 = 5646771^2 + 5830972^2 .

It is a de Polignac number, because none of the positive numbers 2^k-65886257191225 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6777719365 + ... + 6777729085.

Almost surely, 2^{65886257191225} is an apocalyptic number.

65886257191225 is the 8117035-th square number.

65886257191225 is the 4058518-th centered octagonal number.

It is an amenable number.

65886257191225 is a deficient number, since it is larger than the sum of its proper divisors (16313302356596).

65886257191225 is an frugal number, since it uses more digits than its factorization.

65886257191225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19786 (or 9893 counting only the distinct ones).

The product of its digits is 145152000, while the sum is 67.

The spelling of 65886257191225 in words is "sixty-five trillion, eight hundred eighty-six billion, two hundred fifty-seven million, one hundred ninety-one thousand, two hundred twenty-five".