65561164 has 6 divisors (see below), whose sum is σ = 114732044. Its totient is φ = 32780580.

The previous prime is 65561143. The next prime is 65561189. The reversal of 65561164 is 46116556.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8195142 + ... + 8195149.

Almost surely, 2^65561164 is an apocalyptic number.

It is an amenable number.

65561164 is a deficient number, since it is larger than the sum of its proper divisors (49170880).

65561164 is a wasteful number, since it uses less digits than its factorization.

65561164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16390295 (or 16390293 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 65561164 is about 8096.9848709257. The cubic root of 65561164 is about 403.2263319889.

The spelling of 65561164 in words is "sixty-five million, five hundred sixty-one thousand, one hundred sixty-four".