82681668 has 48 divisors (see below), whose sum is σ = 221760000. Its totient is φ = 26609184.

The previous prime is 82681663. The next prime is 82681679. The reversal of 82681668 is 86618628.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (82681663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10068 + ... + 16331.

It is an arithmetic number, because the mean of its divisors is an integer number (4620000).

Almost surely, 2^82681668 is an apocalyptic number.

It is an amenable number.

82681668 is an abundant number, since it is smaller than the sum of its proper divisors (139078332).

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

82681668 is a wasteful number, since it uses less digits than its factorization.

82681668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26441 (or 26433 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 82681668 is about 9092.9460572468. The cubic root of 82681668 is about 435.6486873461.

The spelling of 82681668 in words is "eighty-two million, six hundred eighty-one thousand, six hundred sixty-eight".