82666986 has 16 divisors (see below), whose sum is σ = 174036000. Its totient is φ = 26105328.

The previous prime is 82666973. The next prime is 82666999. The reversal of 82666986 is 68966628.

It is an interprime number because it is at equal distance from previous prime (82666973) and next prime (82666999).

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, 362461 + ... + 362688.

It is an arithmetic number, because the mean of its divisors is an integer number (10877250).

Almost surely, 2^82666986 is an apocalyptic number.

82666986 is an abundant number, since it is smaller than the sum of its proper divisors (91369014).

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

82666986 is a wasteful number, since it uses less digits than its factorization.

82666986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725173.

The product of its digits is 1492992, while the sum is 51.

The square root of 82666986 is about 9092.1386922990. The cubic root of 82666986 is about 435.6228993941.

The spelling of 82666986 in words is "eighty-two million, six hundred sixty-six thousand, nine hundred eighty-six".