8729666 has 12 divisors (see below), whose sum is σ = 14393526. Its totient is φ = 3967920.

The previous prime is 8729659. The next prime is 8729681. The reversal of 8729666 is 6669278.

It can be written as a sum of positive squares in only one way, i.e., 5593225 + 3136441 = 2365^2 + 1771^2 .

It is a d-powerful number, because it can be written as 8³ + 7² + 2²³ + 9⁵ + 6³ + 6⁴ + 6⁷ .

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, 17795 + ... + 18278.

Almost surely, 2^8729666 is an apocalyptic number.

8729666 is a deficient number, since it is larger than the sum of its proper divisors (5663860).

8729666 is a wasteful number, since it uses less digits than its factorization.

8729666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36097 (or 36086 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 8729666 is about 2954.6008190617. The cubic root of 8729666 is about 205.9045179146.

The spelling of 8729666 in words is "eight million, seven hundred twenty-nine thousand, six hundred sixty-six".