82665879 has 4 divisors (see below), whose sum is σ = 110221176. Its totient is φ = 55110584.

The previous prime is 82665859. The next prime is 82665889. The reversal of 82665879 is 97856628.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82665879 - 2¹⁷ = 82534807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82665829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13777644 + ... + 13777649.

It is an arithmetic number, because the mean of its divisors is an integer number (27555294).

Almost surely, 2^82665879 is an apocalyptic number.

82665879 is a deficient number, since it is larger than the sum of its proper divisors (27555297).

82665879 is a wasteful number, since it uses less digits than its factorization.

82665879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27555296.

The product of its digits is 1451520, while the sum is 51.

The square root of 82665879 is about 9092.0778153291. The cubic root of 82665879 is about 435.6209548988.

The spelling of 82665879 in words is "eighty-two million, six hundred sixty-five thousand, eight hundred seventy-nine".