65661160 has 32 divisors (see below), whose sum is σ = 148246560. Its totient is φ = 26174016.

The previous prime is 65661151. The next prime is 65661163. The reversal of 65661160 is 6116656.

It is a super-2 number, since 2×65661160² = 8622775865091200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65661163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9607 + ... + 14953.

It is an arithmetic number, because the mean of its divisors is an integer number (4632705).

Almost surely, 2^65661160 is an apocalyptic number.

It is an amenable number.

65661160 is an abundant number, since it is smaller than the sum of its proper divisors (82585400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65661160 is a wasteful number, since it uses less digits than its factorization.

65661160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5665 (or 5661 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 65661160 is about 8103.1574093066. The cubic root of 65661160 is about 403.4312324490.

It can be divided in two parts, 656 and 61160, that added together give a palindrome (61816).

The spelling of 65661160 in words is "sixty-five million, six hundred sixty-one thousand, one hundred sixty".