82857066 has 16 divisors (see below), whose sum is σ = 166908000. Its totient is φ = 27420048.

The previous prime is 82857053. The next prime is 82857077. The reversal of 82857066 is 66075828.

It is a super-2 number, since 2×82857066² = 13730586772256712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48841 + ... + 50508.

It is an arithmetic number, because the mean of its divisors is an integer number (10431750).

Almost surely, 2^82857066 is an apocalyptic number.

82857066 is an abundant number, since it is smaller than the sum of its proper divisors (84050934).

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

82857066 is a wasteful number, since it uses less digits than its factorization.

82857066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99493.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 82857066 is about 9102.5856766086. The cubic root of 82857066 is about 435.9565264007.

It can be divided in two parts, 8285 and 7066, that added together give a palindrome (15351).

The spelling of 82857066 in words is "eighty-two million, eight hundred fifty-seven thousand, sixty-six".