82661679 has 12 divisors (see below), whose sum is σ = 121082832. Its totient is φ = 54331200.

The previous prime is 82661659. The next prime is 82661681. The reversal of 82661679 is 97616628.

82661679 is a `hidden beast` number, since 8 + 26 + 616 + 7 + 9 = 666.

It is not a de Polignac number, because 82661679 - 2⁹ = 82661167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82661639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64042 + ... + 65319.

It is an arithmetic number, because the mean of its divisors is an integer number (10090236).

Almost surely, 2^82661679 is an apocalyptic number.

82661679 is a deficient number, since it is larger than the sum of its proper divisors (38421153).

82661679 is a wasteful number, since it uses less digits than its factorization.

82661679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129438 (or 129435 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 82661679 is about 9091.8468420888. The cubic root of 82661679 is about 435.6135772519.

The spelling of 82661679 in words is "eighty-two million, six hundred sixty-one thousand, six hundred seventy-nine".