865880668 has 12 divisors (see below), whose sum is σ = 1515497872. Its totient is φ = 432881280.

The previous prime is 865880657. The next prime is 865880683. The reversal of 865880668 is 866088568.

865880668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×865880668² = 1499498662432252448, which contains 22 as substring.

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, 46153 + ... + 62143.

Almost surely, 2^865880668 is an apocalyptic number.

It is an amenable number.

865880668 is a deficient number, since it is larger than the sum of its proper divisors (649617204).

865880668 is a wasteful number, since it uses less digits than its factorization.

865880668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29532 (or 29530 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 55.

The square root of 865880668 is about 29425.8503360566. The cubic root of 865880668 is about 953.1311892573.

The spelling of 865880668 in words is "eight hundred sixty-five million, eight hundred eighty thousand, six hundred sixty-eight".