65461866625 has 8 divisors (see below), whose sum is σ = 81696409704. Its totient is φ = 52369493200.

The previous prime is 65461866611. The next prime is 65461866637. The reversal of 65461866625 is 52666816456.

65461866625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14179093776 + 51282772849 = 119076^2 + 226457^2 .

It is not a de Polignac number, because 65461866625 - 2²⁵ = 65428312193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261847342 + ... + 261847591.

It is an arithmetic number, because the mean of its divisors is an integer number (10212051213).

Almost surely, 2^65461866625 is an apocalyptic number.

It is an amenable number.

65461866625 is a deficient number, since it is larger than the sum of its proper divisors (16234543079).

65461866625 is an equidigital number, since it uses as much as digits as its factorization.

65461866625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523694948 (or 523694938 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 55.

The spelling of 65461866625 in words is "sixty-five billion, four hundred sixty-one million, eight hundred sixty-six thousand, six hundred twenty-five".