82216665 has 24 divisors (see below), whose sum is σ = 142758720. Its totient is φ = 43772064.

The previous prime is 82216657. The next prime is 82216691. The reversal of 82216665 is 56661228.

It is not a de Polignac number, because 82216665 - 2³ = 82216657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32206 + ... + 34664.

It is an arithmetic number, because the mean of its divisors is an integer number (5948280).

Almost surely, 2^82216665 is an apocalyptic number.

It is an amenable number.

82216665 is a deficient number, since it is larger than the sum of its proper divisors (60542055).

82216665 is a wasteful number, since it uses less digits than its factorization.

82216665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213 (or 3210 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 82216665 is about 9067.3405693180. The cubic root of 82216665 is about 434.8304531487.

The spelling of 82216665 in words is "eighty-two million, two hundred sixteen thousand, six hundred sixty-five".