82118664 has 32 divisors (see below), whose sum is σ = 228108000. Its totient is φ = 27372816.

The previous prime is 82118639. The next prime is 82118669. The reversal of 82118664 is 46681128.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (82118669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189874 + ... + 190305.

It is an arithmetic number, because the mean of its divisors is an integer number (7128375).

Almost surely, 2^82118664 is an apocalyptic number.

It is an amenable number.

82118664 is an abundant number, since it is smaller than the sum of its proper divisors (145989336).

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

82118664 is a wasteful number, since it uses less digits than its factorization.

82118664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380194 (or 380184 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 82118664 is about 9061.9348927257. The cubic root of 82118664 is about 434.6576140528.

The spelling of 82118664 in words is "eighty-two million, one hundred eighteen thousand, six hundred sixty-four".