8723666 has 12 divisors (see below), whose sum is σ = 15222078. Its totient is φ = 3738672.

The previous prime is 8723653. The next prime is 8723677. The reversal of 8723666 is 6663278.

It can be written as a sum of positive squares in only one way, i.e., 7958041 + 765625 = 2821^2 + 875^2 .

It is a super-2 number, since 2×8723666² = 152204696959112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44411 + ... + 44606.

Almost surely, 2^8723666 is an apocalyptic number.

8723666 is a deficient number, since it is larger than the sum of its proper divisors (6498412).

8723666 is a wasteful number, since it uses less digits than its factorization.

8723666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89033 (or 89026 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 8723666 is about 2953.5852789449. The cubic root of 8723666 is about 205.8573335872.

The spelling of 8723666 in words is "eight million, seven hundred twenty-three thousand, six hundred sixty-six".