82866620 has 12 divisors (see below), whose sum is σ = 174019944. Its totient is φ = 33146640.

The previous prime is 82866599. The next prime is 82866647. The reversal of 82866620 is 2666828.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2071646 + ... + 2071685.

It is an arithmetic number, because the mean of its divisors is an integer number (14501662).

Almost surely, 2^82866620 is an apocalyptic number.

It is an amenable number.

82866620 is an abundant number, since it is smaller than the sum of its proper divisors (91153324).

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

82866620 is a wasteful number, since it uses less digits than its factorization.

82866620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4143340 (or 4143338 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 82866620 is about 9103.1104574206. The cubic root of 82866620 is about 435.9732820370.

The spelling of 82866620 in words is "eighty-two million, eight hundred sixty-six thousand, six hundred twenty".