865275966 has 32 divisors (see below), whose sum is σ = 1923897600. Its totient is φ = 288266040.

The previous prime is 865275949. The next prime is 865275977. The reversal of 865275966 is 669572568.

It is a happy number.

865275966 is a `hidden beast` number, since 8 + 6 + 527 + 59 + 66 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133951 + ... + 140261.

It is an arithmetic number, because the mean of its divisors is an integer number (60121800).

Almost surely, 2^865275966 is an apocalyptic number.

865275966 is an abundant number, since it is smaller than the sum of its proper divisors (1058621634).

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

865275966 is a wasteful number, since it uses less digits than its factorization.

865275966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8861 (or 8855 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 865275966 is about 29415.5735283200. The cubic root of 865275966 is about 952.9092593078.

The spelling of 865275966 in words is "eight hundred sixty-five million, two hundred seventy-five thousand, nine hundred sixty-six".