82666 has 4 divisors (see below), whose sum is σ = 124002. Its totient is φ = 41332.

The previous prime is 82657. The next prime is 82699. The reversal of 82666 is 66628.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50625 + 32041 = 225^2 + 179^2 .

82666 is a modest number, since divided by 666 gives 82 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20665 + ... + 20668.

2⁸²⁶⁶⁶ is an apocalyptic number.

82666 is a deficient number, since it is larger than the sum of its proper divisors (41336).

82666 is a wasteful number, since it uses less digits than its factorization.

82666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41335.

The product of its digits is 3456, while the sum is 28.

The square root of 82666 is about 287.5169560217. The cubic root of 82666 is about 43.5621167442.

The spelling of 82666 in words is "eighty-two thousand, six hundred sixty-six".