866827399 has 16 divisors (see below), whose sum is σ = 926821440. Its totient is φ = 807877120.

The previous prime is 866827397. The next prime is 866827417. The reversal of 866827399 is 993728668.

It is a cyclic number.

It is not a de Polignac number, because 866827399 - 2¹ = 866827397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866827391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1055409 + ... + 1056229.

It is an arithmetic number, because the mean of its divisors is an integer number (57926340).

Almost surely, 2^866827399 is an apocalyptic number.

866827399 is a deficient number, since it is larger than the sum of its proper divisors (59994041).

866827399 is a wasteful number, since it uses less digits than its factorization.

866827399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370.

The product of its digits is 7838208, while the sum is 58.

The square root of 866827399 is about 29441.9326641442. The cubic root of 866827399 is about 953.4784388669.

The spelling of 866827399 in words is "eight hundred sixty-six million, eight hundred twenty-seven thousand, three hundred ninety-nine".