8673437666 has 4 divisors (see below), whose sum is σ = 13010156502. Its totient is φ = 4336718832.

The previous prime is 8673437639. The next prime is 8673437687. The reversal of 8673437666 is 6667343768.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8359262041 + 314175625 = 91429^2 + 17725^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2168359415 + ... + 2168359418.

Almost surely, 2^8673437666 is an apocalyptic number.

8673437666 is a deficient number, since it is larger than the sum of its proper divisors (4336718836).

8673437666 is a wasteful number, since it uses less digits than its factorization.

8673437666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4336718835.

The product of its digits is 18289152, while the sum is 56.

The square root of 8673437666 is about 93131.2926249819. The cubic root of 8673437666 is about 2054.6148397961.

The spelling of 8673437666 in words is "eight billion, six hundred seventy-three million, four hundred thirty-seven thousand, six hundred sixty-six".