8666579493 has 48 divisors (see below), whose sum is σ = 14719024320. Its totient is φ = 4844448000.

The previous prime is 8666579489. The next prime is 8666579507. The reversal of 8666579493 is 3949756668.

It is not a de Polignac number, because 8666579493 - 2² = 8666579489 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8666579493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8666579473) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2316018 + ... + 2319756.

It is an arithmetic number, because the mean of its divisors is an integer number (306646340).

Almost surely, 2^8666579493 is an apocalyptic number.

It is an amenable number.

8666579493 is a deficient number, since it is larger than the sum of its proper divisors (6052444827).

8666579493 is a wasteful number, since it uses less digits than its factorization.

8666579493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5570 (or 5567 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 63.

The square root of 8666579493 is about 93094.4654262540. The cubic root of 8666579493 is about 2054.0731622385.

The spelling of 8666579493 in words is "eight billion, six hundred sixty-six million, five hundred seventy-nine thousand, four hundred ninety-three".