866082243 has 18 divisors (see below), whose sum is σ = 1251395724. Its totient is φ = 532565904.

The previous prime is 866082233. The next prime is 866082253. The reversal of 866082243 is 342280668.

It is an interprime number because it is at equal distance from previous prime (866082233) and next prime (866082253).

It is not a de Polignac number, because 866082243 - 2¹⁴ = 866065859 is a prime.

It is a super-2 number, since 2×866082243² = 1500196903279822098, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (866082233) 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 17 ways as a sum of consecutive naturals, for example, 661996 + ... + 663302.

Almost surely, 2^866082243 is an apocalyptic number.

866082243 is a deficient number, since it is larger than the sum of its proper divisors (385313481).

866082243 is an equidigital number, since it uses as much as digits as its factorization.

866082243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643 (or 1323 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 866082243 is about 29429.2752714028. The cubic root of 866082243 is about 953.2051457579.

Multiplying 866082243 by its product of nonzero digits (110592), we get a square (95781767417856 = 9786816²).

The spelling of 866082243 in words is "eight hundred sixty-six million, eighty-two thousand, two hundred forty-three".