83665608 has 64 divisors (see below), whose sum is σ = 226430400. Its totient is φ = 25608960.

The previous prime is 83665601. The next prime is 83665613. The reversal of 83665608 is 80656638.

83665608 is nontrivially palindromic in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 83665608.

It is not an unprimeable number, because it can be changed into a prime (83665601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70863 + ... + 72033.

It is an arithmetic number, because the mean of its divisors is an integer number (3537975).

Almost surely, 2^83665608 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 83665608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113215200).

83665608 is an abundant number, since it is smaller than the sum of its proper divisors (142764792).

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

83665608 is a wasteful number, since it uses less digits than its factorization.

83665608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 83665608 is about 9146.8906192214. The cubic root of 83665608 is about 437.3699997969.

The spelling of 83665608 in words is "eighty-three million, six hundred sixty-five thousand, six hundred eight".