82818666 has 32 divisors (see below), whose sum is σ = 210334080. Its totient is φ = 23662368.

The previous prime is 82818649. The next prime is 82818689. The reversal of 82818666 is 66681828.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109171 + ... + 109926.

It is an arithmetic number, because the mean of its divisors is an integer number (6572940).

Almost surely, 2^82818666 is an apocalyptic number.

82818666 is an abundant number, since it is smaller than the sum of its proper divisors (127515414).

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

82818666 is a wasteful number, since it uses less digits than its factorization.

82818666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219115 (or 219109 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 82818666 is about 9100.4761413895. The cubic root of 82818666 is about 435.8891681647.

The spelling of 82818666 in words is "eighty-two million, eight hundred eighteen thousand, six hundred sixty-six".