83331666 has 80 divisors (see below), whose sum is σ = 206160768. Its totient is φ = 24948000.

The previous prime is 83331653. The next prime is 83331667. The reversal of 83331666 is 66613338.

It is a self number, because there is not a number n which added to its sum of digits gives 83331666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83331667) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 179751 + ... + 180213.

Almost surely, 2^83331666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83331666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103080384).

83331666 is an abundant number, since it is smaller than the sum of its proper divisors (122829102).

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

83331666 is a wasteful number, since it uses less digits than its factorization.

83331666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589 (or 580 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 83331666 is about 9128.6179676882. The cubic root of 83331666 is about 436.7873192491.

It can be divided in two parts, 8333 and 1666, that added together give a palindrome (9999).

The spelling of 83331666 in words is "eighty-three million, three hundred thirty-one thousand, six hundred sixty-six".