866331081 has 36 divisors (see below), whose sum is σ = 1571979136. Its totient is φ = 450038160.

The previous prime is 866331031. The next prime is 866331097. The reversal of 866331081 is 180133668.

866331081 is a `hidden beast` number, since 8 + 6 + 633 + 10 + 8 + 1 = 666.

866331081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 866331081 - 2⁶ = 866331017 is a prime.

It is a super-2 number, since 2×866331081² = 1501059083813257122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866331031) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49201 + ... + 64446.

Almost surely, 2^866331081 is an apocalyptic number.

It is an amenable number.

866331081 is a deficient number, since it is larger than the sum of its proper divisors (705648055).

866331081 is a wasteful number, since it uses less digits than its factorization.

866331081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113682 (or 113668 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 866331081 is about 29433.5026967570. The cubic root of 866331081 is about 953.2964269079.

The spelling of 866331081 in words is "eight hundred sixty-six million, three hundred thirty-one thousand, eighty-one".