82566138 has 8 divisors (see below), whose sum is σ = 165132288. Its totient is φ = 27522044.

The previous prime is 82566131. The next prime is 82566151. The reversal of 82566138 is 83166528.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

82566138 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 82566096 and 82566105.

It is not an unprimeable number, because it can be changed into a prime (82566131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6880506 + ... + 6880517.

It is an arithmetic number, because the mean of its divisors is an integer number (20641536).

Almost surely, 2^82566138 is an apocalyptic number.

82566138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

82566138 is a wasteful number, since it uses less digits than its factorization.

82566138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13761028.

The product of its digits is 69120, while the sum is 39.

The square root of 82566138 is about 9086.5911099818. The cubic root of 82566138 is about 435.4456840512.

The spelling of 82566138 in words is "eighty-two million, five hundred sixty-six thousand, one hundred thirty-eight".