65988625 has 8 divisors (see below), whose sum is σ = 82353960. Its totient is φ = 52790800.

The previous prime is 65988623. The next prime is 65988647. The reversal of 65988625 is 52688956.

It can be written as a sum of positive squares in 4 ways, for example, as 19421649 + 46566976 = 4407^2 + 6824^2 .

It is not a de Polignac number, because 65988625 - 2¹ = 65988623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65988623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263830 + ... + 264079.

It is an arithmetic number, because the mean of its divisors is an integer number (10294245).

Almost surely, 2^65988625 is an apocalyptic number.

It is an amenable number.

65988625 is a deficient number, since it is larger than the sum of its proper divisors (16365335).

65988625 is an equidigital number, since it uses as much as digits as its factorization.

65988625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527924 (or 527914 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 49.

The square root of 65988625 is about 8123.3382916139. The cubic root of 65988625 is about 404.1007840085.

The spelling of 65988625 in words is "sixty-five million, nine hundred eighty-eight thousand, six hundred twenty-five".