65187968 has 16 divisors (see below), whose sum is σ = 129866910. Its totient is φ = 32593920.

The previous prime is 65187959. The next prime is 65187971. The reversal of 65187968 is 86978156.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 62853184 + 2334784 = 7928^2 + 1528^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254513 + ... + 254768.

Almost surely, 2^65187968 is an apocalyptic number.

It is an amenable number.

65187968 is a deficient number, since it is larger than the sum of its proper divisors (64678942).

65187968 is an equidigital number, since it uses as much as digits as its factorization.

65187968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509295 (or 509283 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 65187968 is about 8073.9066132821. The cubic root of 65187968 is about 402.4597760814.

The spelling of 65187968 in words is "sixty-five million, one hundred eighty-seven thousand, nine hundred sixty-eight".