8631791666 has 16 divisors (see below), whose sum is σ = 13017902904. Its totient is φ = 4292542464.

The previous prime is 8631791659. The next prime is 8631791677. The reversal of 8631791666 is 6661971368.

It can be written as a sum of positive squares in 4 ways, for example, as 8622051025 + 9740641 = 92855^2 + 3121^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333446 + ... + 358398.

Almost surely, 2^8631791666 is an apocalyptic number.

8631791666 is a deficient number, since it is larger than the sum of its proper divisors (4386111238).

8631791666 is a wasteful number, since it uses less digits than its factorization.

8631791666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25885.

The product of its digits is 1959552, while the sum is 53.

The square root of 8631791666 is about 92907.4360102570. The cubic root of 8631791666 is about 2051.3211128185.

The spelling of 8631791666 in words is "eight billion, six hundred thirty-one million, seven hundred ninety-one thousand, six hundred sixty-six".