866776282645 has 32 divisors (see below), whose sum is σ = 1292590720512. Its totient is φ = 543314172672.

The previous prime is 866776282627. The next prime is 866776282651. The reversal of 866776282645 is 546282677668.

It is a cyclic number.

It is not a de Polignac number, because 866776282645 - 2⁹ = 866776282133 is a prime.

It is a super-2 number, since 2×866776282645² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9200722 + ... + 9294451.

It is an arithmetic number, because the mean of its divisors is an integer number (40393460016).

Almost surely, 2^866776282645 is an apocalyptic number.

It is an amenable number.

866776282645 is a deficient number, since it is larger than the sum of its proper divisors (425814437867).

866776282645 is a wasteful number, since it uses less digits than its factorization.

866776282645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18495301.

The product of its digits is 325140480, while the sum is 67.

The spelling of 866776282645 in words is "eight hundred sixty-six billion, seven hundred seventy-six million, two hundred eighty-two thousand, six hundred forty-five".