866808383 has 18 divisors (see below), whose sum is σ = 1053369576. Its totient is φ = 709864848.

The previous prime is 866808377. The next prime is 866808407. The reversal of 866808383 is 383808668.

It is not a de Polignac number, because 866808383 - 2¹⁶ = 866742847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866808373) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 987941 + ... + 988817.

It is an arithmetic number, because the mean of its divisors is an integer number (58520532).

Almost surely, 2^866808383 is an apocalyptic number.

866808383 is a deficient number, since it is larger than the sum of its proper divisors (186561193).

866808383 is an frugal number, since it uses more digits than its factorization.

866808383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 50.

The square root of 866808383 is about 29441.6097216168. The cubic root of 866808383 is about 953.4714665144.

The spelling of 866808383 in words is "eight hundred sixty-six million, eight hundred eight thousand, three hundred eighty-three".