866491226686 has 16 divisors (see below), whose sum is σ = 1382363224704. Its totient is φ = 405932050944.

The previous prime is 866491226681. The next prime is 866491226701. The reversal of 866491226686 is 686622194668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866491226681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57133755 + ... + 57148918.

It is an arithmetic number, because the mean of its divisors is an integer number (86397701544).

Almost surely, 2^866491226686 is an apocalyptic number.

866491226686 is a deficient number, since it is larger than the sum of its proper divisors (515871998018).

866491226686 is a wasteful number, since it uses less digits than its factorization.

866491226686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114282915.

The product of its digits is 71663616, while the sum is 64.

The spelling of 866491226686 in words is "eight hundred sixty-six billion, four hundred ninety-one million, two hundred twenty-six thousand, six hundred eighty-six".