866278347464 has 16 divisors (see below), whose sum is σ = 1624282159500. Its totient is φ = 433136438272.

The previous prime is 866278347449. The next prime is 866278347499. The reversal of 866278347464 is 464743872668.

It can be written as a sum of positive squares in 2 ways, for example, as 815513751364 + 50764596100 = 903058^2 + 225310^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 866278347464.

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, 1774712 + ... + 2209560.

Almost surely, 2^866278347464 is an apocalyptic number.

It is an amenable number.

866278347464 is a deficient number, since it is larger than the sum of its proper divisors (758003812036).

866278347464 is a wasteful number, since it uses less digits than its factorization.

866278347464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683872 (or 683868 counting only the distinct ones).

The product of its digits is 260112384, while the sum is 65.

The spelling of 866278347464 in words is "eight hundred sixty-six billion, two hundred seventy-eight million, three hundred forty-seven thousand, four hundred sixty-four".