866242907 has 4 divisors (see below), whose sum is σ = 869304120. Its totient is φ = 863181696.

The previous prime is 866242903. The next prime is 866242919. The reversal of 866242907 is 709242668.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 866242907 - 2² = 866242903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866242901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530182 + ... + 1530747.

It is an arithmetic number, because the mean of its divisors is an integer number (217326030).

Almost surely, 2^866242907 is an apocalyptic number.

866242907 is a deficient number, since it is larger than the sum of its proper divisors (3061213).

866242907 is a wasteful number, since it uses less digits than its factorization.

866242907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061212.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 866242907 is about 29432.0048076919. The cubic root of 866242907 is about 953.2640840723.

The spelling of 866242907 in words is "eight hundred sixty-six million, two hundred forty-two thousand, nine hundred seven".