866845646 has 8 divisors (see below), whose sum is σ = 1300435104. Its totient is φ = 433367280.

The previous prime is 866845619. The next prime is 866845663. The reversal of 866845646 is 646548668.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4295 + ... + 41858.

It is an arithmetic number, because the mean of its divisors is an integer number (162554388).

Almost surely, 2^866845646 is an apocalyptic number.

866845646 is a deficient number, since it is larger than the sum of its proper divisors (433589458).

866845646 is a wasteful number, since it uses less digits than its factorization.

866845646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55546.

The product of its digits is 6635520, while the sum is 53.

The square root of 866845646 is about 29442.2425436650. The cubic root of 866845646 is about 953.4851291642.

The spelling of 866845646 in words is "eight hundred sixty-six million, eight hundred forty-five thousand, six hundred forty-six".