865966998 has 16 divisors (see below), whose sum is σ = 1865159856. Its totient is φ = 266451360.

The previous prime is 865966979. The next prime is 865967017. The reversal of 865966998 is 899669568.

It is an interprime number because it is at equal distance from previous prime (865966979) and next prime (865967017).

It is a Curzon number.

It is a congruent number.

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, 5550993 + ... + 5551148.

It is an arithmetic number, because the mean of its divisors is an integer number (116572491).

Almost surely, 2^865966998 is an apocalyptic number.

865966998 is an abundant number, since it is smaller than the sum of its proper divisors (999192858).

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

865966998 is a wasteful number, since it uses less digits than its factorization.

865966998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11102159.

The product of its digits is 50388480, while the sum is 66.

The square root of 865966998 is about 29427.3172069762. The cubic root of 865966998 is about 953.1628645540.

It can be divided in two parts, 8659 and 66998, that added together give a palindrome (75657).

The spelling of 865966998 in words is "eight hundred sixty-five million, nine hundred sixty-six thousand, nine hundred ninety-eight".