82100664 has 48 divisors (see below), whose sum is σ = 222856920. Its totient is φ = 27305280.

The previous prime is 82100659. The next prime is 82100687. The reversal of 82100664 is 46600128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40114 + ... + 42110.

Almost surely, 2^82100664 is an apocalyptic number.

It is an amenable number.

82100664 is an abundant number, since it is smaller than the sum of its proper divisors (140756256).

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

82100664 is a wasteful number, since it uses less digits than its factorization.

82100664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580 (or 2573 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 82100664 is about 9060.9416729168. The cubic root of 82100664 is about 434.6258534745.

The spelling of 82100664 in words is "eighty-two million, one hundred thousand, six hundred sixty-four".