866899399 has 8 divisors (see below), whose sum is σ = 880511600. Its totient is φ = 853307136.

The previous prime is 866899391. The next prime is 866899403. The reversal of 866899399 is 993998668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 866899399 - 2³ = 866899391 is a prime.

It is a super-2 number, since 2×866899399² = 1503029135973122402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866899391) 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 7 ways as a sum of consecutive naturals, for example, 99607 + ... + 107959.

It is an arithmetic number, because the mean of its divisors is an integer number (110063950).

Almost surely, 2^866899399 is an apocalyptic number.

866899399 is a deficient number, since it is larger than the sum of its proper divisors (13612201).

866899399 is a wasteful number, since it uses less digits than its factorization.

866899399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9969.

The product of its digits is 45349632, while the sum is 67.

The square root of 866899399 is about 29443.1553845711. The cubic root of 866899399 is about 953.5048372584.

The spelling of 866899399 in words is "eight hundred sixty-six million, eight hundred ninety-nine thousand, three hundred ninety-nine".