65426616 has 80 divisors (see below), whose sum is σ = 189224640. Its totient is φ = 21098880.

The previous prime is 65426609. The next prime is 65426617. The reversal of 65426616 is 61662456.

It is a happy number.

It is a super-2 number, since 2×65426616² = 8561284162422912, which contains 22 as substring.

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 (65426617) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18460 + ... + 21716.

It is an arithmetic number, because the mean of its divisors is an integer number (2365308).

Almost surely, 2^65426616 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 65426616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94612320).

65426616 is an abundant number, since it is smaller than the sum of its proper divisors (123798024).

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

65426616 is a wasteful number, since it uses less digits than its factorization.

65426616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3306 (or 3293 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 65426616 is about 8088.6720789015. The cubic root of 65426616 is about 402.9503024547.

The spelling of 65426616 in words is "sixty-five million, four hundred twenty-six thousand, six hundred sixteen".