82257866 has 16 divisors (see below), whose sum is σ = 130813056. Its totient is φ = 38659776.

The previous prime is 82257863. The next prime is 82257871. The reversal of 82257866 is 66875228.

It is not an unprimeable number, because it can be changed into a prime (82257863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49745 + ... + 51371.

It is an arithmetic number, because the mean of its divisors is an integer number (8175816).

Almost surely, 2^82257866 is an apocalyptic number.

82257866 is a deficient number, since it is larger than the sum of its proper divisors (48555190).

82257866 is a wasteful number, since it uses less digits than its factorization.

82257866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3133.

The product of its digits is 322560, while the sum is 44.

The square root of 82257866 is about 9069.6122298586. The cubic root of 82257866 is about 434.9030761288.

The spelling of 82257866 in words is "eighty-two million, two hundred fifty-seven thousand, eight hundred sixty-six".