65116557 has 12 divisors (see below), whose sum is σ = 102608064. Its totient is φ = 39464520.

The previous prime is 65116549. The next prime is 65116567. The reversal of 65116557 is 75561156.

It is not a de Polignac number, because 65116557 - 2³ = 65116549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65116517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 328773 + ... + 328970.

It is an arithmetic number, because the mean of its divisors is an integer number (8550672).

Almost surely, 2^65116557 is an apocalyptic number.

It is an amenable number.

65116557 is a deficient number, since it is larger than the sum of its proper divisors (37491507).

65116557 is a wasteful number, since it uses less digits than its factorization.

65116557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657760 (or 657757 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 65116557 is about 8069.4830689456. The cubic root of 65116557 is about 402.3127624689.

The spelling of 65116557 in words is "sixty-five million, one hundred sixteen thousand, five hundred fifty-seven".