866444668 has 24 divisors (see below), whose sum is σ = 1601600000. Its totient is φ = 409494960.

The previous prime is 866444659. The next prime is 866444701.

It is a happy number.

866444668 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×866444668³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 75918 + ... + 86581.

Almost surely, 2^866444668 is an apocalyptic number.

It is an amenable number.

866444668 is a deficient number, since it is larger than the sum of its proper divisors (735155332).

866444668 is a wasteful number, since it uses less digits than its factorization.

866444668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162577 (or 162575 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 52.

The square root of 866444668 is about 29435.4321863974. The cubic root of 866444668 is about 953.3380881740.

The spelling of 866444668 in words is "eight hundred sixty-six million, four hundred forty-four thousand, six hundred sixty-eight".