82666686 has 16 divisors (see below), whose sum is σ = 165965184. Its totient is φ = 27450264.

The previous prime is 82666681. The next prime is 82666687. The reversal of 82666686 is 68666628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82666681) 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, 24616 + ... + 27771.

It is an arithmetic number, because the mean of its divisors is an integer number (10372824).

Almost surely, 2^82666686 is an apocalyptic number.

82666686 is an abundant number, since it is smaller than the sum of its proper divisors (83298498).

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

82666686 is a wasteful number, since it uses less digits than its factorization.

82666686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52655.

The product of its digits is 995328, while the sum is 48.

The square root of 82666686 is about 9092.1221945154. The cubic root of 82666686 is about 435.6223724323.

The spelling of 82666686 in words is "eighty-two million, six hundred sixty-six thousand, six hundred eighty-six".