82668156 has 12 divisors (see below), whose sum is σ = 192892392. Its totient is φ = 27556048.

The previous prime is 82668139. The next prime is 82668169. The reversal of 82668156 is 65186628.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3444495 + ... + 3444518.

It is an arithmetic number, because the mean of its divisors is an integer number (16074366).

Almost surely, 2^82668156 is an apocalyptic number.

It is an amenable number.

82668156 is an abundant number, since it is smaller than the sum of its proper divisors (110224236).

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

82668156 is a wasteful number, since it uses less digits than its factorization.

82668156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6889020 (or 6889018 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 82668156 is about 9092.2030333688. The cubic root of 82668156 is about 435.6249545329.

The spelling of 82668156 in words is "eighty-two million, six hundred sixty-eight thousand, one hundred fifty-six".