82699866 has 40 divisors (see below), whose sum is σ = 196216020. Its totient is φ = 25944192.

The previous prime is 82699853. The next prime is 82699889. The reversal of 82699866 is 66899628.

It can be written as a sum of positive squares in 2 ways, for example, as 64883025 + 17816841 = 8055^2 + 4221^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12261 + ... + 17768.

Almost surely, 2^82699866 is an apocalyptic number.

82699866 is an abundant number, since it is smaller than the sum of its proper divisors (113516154).

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

82699866 is a wasteful number, since it uses less digits than its factorization.

82699866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30060 (or 30051 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 82699866 is about 9093.9466679765. The cubic root of 82699866 is about 435.6806466806.

The spelling of 82699866 in words is "eighty-two million, six hundred ninety-nine thousand, eight hundred sixty-six".