64877425 has 6 divisors (see below), whose sum is σ = 80448038. Its totient is φ = 51901920.

The previous prime is 64877413. The next prime is 64877447. The reversal of 64877425 is 52477846.

It can be written as a sum of positive squares in 3 ways, for example, as 7360369 + 57517056 = 2713^2 + 7584^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64877425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1297524 + ... + 1297573.

Almost surely, 2^64877425 is an apocalyptic number.

It is an amenable number.

64877425 is a deficient number, since it is larger than the sum of its proper divisors (15570613).

64877425 is a wasteful number, since it uses less digits than its factorization.

64877425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595107 (or 2595102 counting only the distinct ones).

The product of its digits is 376320, while the sum is 43.

The square root of 64877425 is about 8054.6523823192. The cubic root of 64877425 is about 401.8196781259.

The spelling of 64877425 in words is "sixty-four million, eight hundred seventy-seven thousand, four hundred twenty-five".