865797066 has 16 divisors (see below), whose sum is σ = 1923993600. Its totient is φ = 288599004.

The previous prime is 865797019. The next prime is 865797113. The reversal of 865797066 is 660797568.

It is a happy number.

865797066 is a `hidden beast` number, since 8 + 6 + 579 + 7 + 0 + 66 = 666.

865797066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (865797019) and next prime (865797113).

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 16033279 = 865797066 / (8 + 6 + 5 + 7 + 9 + 7 + 0 + 6 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8016586 + ... + 8016693.

It is an arithmetic number, because the mean of its divisors is an integer number (120249600).

Almost surely, 2^865797066 is an apocalyptic number.

865797066 is an abundant number, since it is smaller than the sum of its proper divisors (1058196534).

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

865797066 is a wasteful number, since it uses less digits than its factorization.

865797066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16033290 (or 16033284 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The square root of 865797066 is about 29424.4297480852. The cubic root of 865797066 is about 953.1005128830.

The spelling of 865797066 in words is "eight hundred sixty-five million, seven hundred ninety-seven thousand, sixty-six".