65511968 has 12 divisors (see below), whose sum is σ = 128976750. Its totient is φ = 32755968.

The previous prime is 65511967. The next prime is 65511977. The reversal of 65511968 is 86911556.

It can be written as a sum of positive squares in only one way, i.e., 44462224 + 21049744 = 6668^2 + 4588^2 .

It is not an unprimeable number, because it can be changed into a prime (65511967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1023593 + ... + 1023656.

Almost surely, 2^65511968 is an apocalyptic number.

It is an amenable number.

65511968 is a deficient number, since it is larger than the sum of its proper divisors (63464782).

65511968 is a wasteful number, since it uses less digits than its factorization.

65511968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047259 (or 2047251 counting only the distinct ones).

The product of its digits is 64800, while the sum is 41.

The square root of 65511968 is about 8093.9463798570. The cubic root of 65511968 is about 403.1254486544.

The spelling of 65511968 in words is "sixty-five million, five hundred eleven thousand, nine hundred sixty-eight".