65617668 has 48 divisors (see below), whose sum is σ = 171064320. Its totient is φ = 21751200.

The previous prime is 65617609. The next prime is 65617681. The reversal of 65617668 is 86671656.

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, 19038 + ... + 22218.

It is an arithmetic number, because the mean of its divisors is an integer number (3563840).

Almost surely, 2^65617668 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 65617668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85532160).

65617668 is an abundant number, since it is smaller than the sum of its proper divisors (105446652).

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

65617668 is a wasteful number, since it uses less digits than its factorization.

65617668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385 (or 3377 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 65617668 is about 8100.4733195042. The cubic root of 65617668 is about 403.3421391577.

The spelling of 65617668 in words is "sixty-five million, six hundred seventeen thousand, six hundred sixty-eight".