82670865 has 16 divisors (see below), whose sum is σ = 132451200. Its totient is φ = 44031872.

The previous prime is 82670857. The next prime is 82670867. The reversal of 82670865 is 56807628.

It is a cyclic number.

It is not a de Polignac number, because 82670865 - 2³ = 82670857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82670867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9301 + ... + 15869.

It is an arithmetic number, because the mean of its divisors is an integer number (8278200).

Almost surely, 2^82670865 is an apocalyptic number.

It is an amenable number.

82670865 is a deficient number, since it is larger than the sum of its proper divisors (49780335).

82670865 is a wasteful number, since it uses less digits than its factorization.

82670865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7416.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 82670865 is about 9092.3520059443. The cubic root of 82670865 is about 435.6297128952.

The spelling of 82670865 in words is "eighty-two million, six hundred seventy thousand, eight hundred sixty-five".