65610380 has 48 divisors (see below), whose sum is σ = 152802720. Its totient is φ = 23462400.

The previous prime is 65610379. The next prime is 65610397. The reversal of 65610380 is 8301656.

It is a super-3 number, since 3×65610380³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10976 + ... + 15864.

It is an arithmetic number, because the mean of its divisors is an integer number (3183390).

Almost surely, 2^65610380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65610380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76401360).

65610380 is an abundant number, since it is smaller than the sum of its proper divisors (87192340).

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

65610380 is a wasteful number, since it uses less digits than its factorization.

65610380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4970 (or 4968 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 65610380 is about 8100.0234567562. The cubic root of 65610380 is about 403.3272058506.

The spelling of 65610380 in words is "sixty-five million, six hundred ten thousand, three hundred eighty".