83990166 has 64 divisors (see below), whose sum is σ = 193814208. Its totient is φ = 24035328.

The previous prime is 83990161. The next prime is 83990171. The reversal of 83990166 is 66109938.

It is an interprime number because it is at equal distance from previous prime (83990161) and next prime (83990171).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83990161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128296 + ... + 128948.

It is an arithmetic number, because the mean of its divisors is an integer number (3028347).

Almost surely, 2^83990166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83990166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96907104).

83990166 is an abundant number, since it is smaller than the sum of its proper divisors (109824042).

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

83990166 is a wasteful number, since it uses less digits than its factorization.

83990166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 83990166 is about 9164.6148855257. The cubic root of 83990166 is about 437.9348227697.

The spelling of 83990166 in words is "eighty-three million, nine hundred ninety thousand, one hundred sixty-six".