83866644 has 72 divisors (see below), whose sum is σ = 231060480. Its totient is φ = 26301312.

The previous prime is 83866613. The next prime is 83866669. The reversal of 83866644 is 44666838.

83866644 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×83866644² = 14067227951645472, which contains 22 as substring.

83866644 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 83866644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29869 + ... + 32555.

Almost surely, 2^83866644 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 83866644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115530240).

83866644 is an abundant number, since it is smaller than the sum of its proper divisors (147193836).

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

83866644 is a wasteful number, since it uses less digits than its factorization.

83866644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734 (or 2709 counting only the distinct ones).

The product of its digits is 663552, while the sum is 45.

The square root of 83866644 is about 9157.8733339133. The cubic root of 83866644 is about 437.7200312534.

The spelling of 83866644 in words is "eighty-three million, eight hundred sixty-six thousand, six hundred forty-four".