82773486666 has 96 divisors (see below), whose sum is σ = 196519115520. Its totient is φ = 25026019200.

The previous prime is 82773486641. The next prime is 82773486671. The reversal of 82773486666 is 66668437728.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3889936 + ... + 3911156.

It is an arithmetic number, because the mean of its divisors is an integer number (2047074120).

Almost surely, 2^82773486666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82773486666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98259557760).

82773486666 is an abundant number, since it is smaller than the sum of its proper divisors (113745628854).

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

82773486666 is a wasteful number, since it uses less digits than its factorization.

82773486666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21532 (or 21529 counting only the distinct ones).

The product of its digits is 97542144, while the sum is 63.

It can be divided in two parts, 8277 and 3486666, that added together give a palindrome (3494943).

The spelling of 82773486666 in words is "eighty-two billion, seven hundred seventy-three million, four hundred eighty-six thousand, six hundred sixty-six".