863665002 has 24 divisors (see below), whose sum is σ = 1872844740. Its totient is φ = 287646720.

The previous prime is 863665001. The next prime is 863665003. The reversal of 863665002 is 200566368.

It is an interprime number because it is at equal distance from previous prime (863665001) and next prime (863665003).

It can be written as a sum of positive squares in 2 ways, for example, as 587141361 + 276523641 = 24231^2 + 16629^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (863665001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2602 + ... + 41642.

Almost surely, 2^863665002 is an apocalyptic number.

863665002 is an abundant number, since it is smaller than the sum of its proper divisors (1009179738).

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

863665002 is a wasteful number, since it uses less digits than its factorization.

863665002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40278 (or 40275 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 863665002 is about 29388.1779292286. The cubic root of 863665002 is about 952.3175189307.

The spelling of 863665002 in words is "eight hundred sixty-three million, six hundred sixty-five thousand, two".