82665289 has 16 divisors (see below), whose sum is σ = 101253888. Its totient is φ = 65938752.

The previous prime is 82665281. The next prime is 82665293. The reversal of 82665289 is 98256628.

It is a cyclic number.

It is not a de Polignac number, because 82665289 - 2³ = 82665281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82665281) 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, 982 + ... + 12895.

It is an arithmetic number, because the mean of its divisors is an integer number (6328368).

Almost surely, 2^82665289 is an apocalyptic number.

It is an amenable number.

82665289 is a deficient number, since it is larger than the sum of its proper divisors (18588599).

82665289 is a wasteful number, since it uses less digits than its factorization.

82665289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13944.

The product of its digits is 414720, while the sum is 46.

The square root of 82665289 is about 9092.0453694425. The cubic root of 82665289 is about 435.6199185301.

It can be divided in two parts, 8 and 2665289, that multiplied together give a palindrome (21322312).

The spelling of 82665289 in words is "eighty-two million, six hundred sixty-five thousand, two hundred eighty-nine".