82011660 has 24 divisors (see below), whose sum is σ = 229632816. Its totient is φ = 21869760.

The previous prime is 82011641. The next prime is 82011661. The reversal of 82011660 is 6611028.

It is a self number, because there is not a number n which added to its sum of digits gives 82011660.

It is not an unprimeable number, because it can be changed into a prime (82011661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 683371 + ... + 683490.

It is an arithmetic number, because the mean of its divisors is an integer number (9568034).

Almost surely, 2^82011660 is an apocalyptic number.

It is an amenable number.

82011660 is an abundant number, since it is smaller than the sum of its proper divisors (147621156).

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

82011660 is a wasteful number, since it uses less digits than its factorization.

82011660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366873 (or 1366871 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 82011660 is about 9056.0289310492. The cubic root of 82011660 is about 434.4687397367.

Adding to 82011660 its reverse (6611028), we get a palindrome (88622688).

The spelling of 82011660 in words is "eighty-two million, eleven thousand, six hundred sixty".