65877578225 has 6 divisors (see below), whose sum is σ = 81688197030. Its totient is φ = 52702062560.

The previous prime is 65877578209. The next prime is 65877578269. The reversal of 65877578225 is 52287577856.

It can be written as a sum of positive squares in 3 ways, for example, as 1280780944 + 64596797281 = 35788^2 + 254159^2 .

It is not a de Polignac number, because 65877578225 - 2⁴ = 65877578209 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1317551540 + ... + 1317551589.

It is an arithmetic number, because the mean of its divisors is an integer number (13614699505).

Almost surely, 2^65877578225 is an apocalyptic number.

It is an amenable number.

65877578225 is a deficient number, since it is larger than the sum of its proper divisors (15810618805).

65877578225 is a wasteful number, since it uses less digits than its factorization.

65877578225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2635103139 (or 2635103134 counting only the distinct ones).

The product of its digits is 65856000, while the sum is 62.

The spelling of 65877578225 in words is "sixty-five billion, eight hundred seventy-seven million, five hundred seventy-eight thousand, two hundred twenty-five".