82176666 has 48 divisors (see below), whose sum is σ = 194571552. Its totient is φ = 22983840.

The previous prime is 82176643. The next prime is 82176671. The reversal of 82176666 is 66667128.

It is a happy number.

It is a Curzon 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, 5085 + ... + 13791.

It is an arithmetic number, because the mean of its divisors is an integer number (4053574).

Almost surely, 2^82176666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82176666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97285776).

82176666 is an abundant number, since it is smaller than the sum of its proper divisors (112394886).

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

82176666 is a wasteful number, since it uses less digits than its factorization.

82176666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747 (or 8736 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 82176666 is about 9065.1346377205. The cubic root of 82176666 is about 434.7599256604.

The spelling of 82176666 in words is "eighty-two million, one hundred seventy-six thousand, six hundred sixty-six".