65057616 has 120 divisors (see below), whose sum is σ = 204736896. Its totient is φ = 19134720.

The previous prime is 65057599. The next prime is 65057617. The reversal of 65057616 is 61675056.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65057617) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42301 + ... + 43811.

Almost surely, 2^65057616 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 65057616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102368448).

65057616 is an abundant number, since it is smaller than the sum of its proper divisors (139679280).

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

65057616 is a wasteful number, since it uses less digits than its factorization.

65057616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 65057616 is about 8065.8301494638. The cubic root of 65057616 is about 402.1913398188.

The spelling of 65057616 in words is "sixty-five million, fifty-seven thousand, six hundred sixteen".