83665568 has 96 divisors (see below), whose sum is σ = 202051584. Its totient is φ = 33288192.

The previous prime is 83665537. The next prime is 83665591. The reversal of 83665568 is 86556638.

It is a congruent number.

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, 483530 + ... + 483702.

It is an arithmetic number, because the mean of its divisors is an integer number (2104704).

Almost surely, 2^83665568 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 83665568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101025792).

83665568 is an abundant number, since it is smaller than the sum of its proper divisors (118386016).

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

83665568 is a wasteful number, since it uses less digits than its factorization.

83665568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 326 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 47.

The square root of 83665568 is about 9146.8884326857. Note that the first 3 decimals coincide. The cubic root of 83665568 is about 437.3699300956.

The spelling of 83665568 in words is "eighty-three million, six hundred sixty-five thousand, five hundred sixty-eight".