865166368 has 48 divisors (see below), whose sum is σ = 1955953440. Its totient is φ = 372556800.

The previous prime is 865166359. The next prime is 865166381. The reversal of 865166368 is 863661568.

It is a super-2 number, since 2×865166368² = 1497025688636622848, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57993 + ... + 71368.

It is an arithmetic number, because the mean of its divisors is an integer number (40749030).

Almost surely, 2^865166368 is an apocalyptic number.

865166368 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

865166368 is an abundant number, since it is smaller than the sum of its proper divisors (1090787072).

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

865166368 is a wasteful number, since it uses less digits than its factorization.

865166368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129401 (or 129393 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 865166368 is about 29413.7105445743. The cubic root of 865166368 is about 952.8690249923.

The spelling of 865166368 in words is "eight hundred sixty-five million, one hundred sixty-six thousand, three hundred sixty-eight".