8664651 has 24 divisors (see below), whose sum is σ = 13117104. Its totient is φ = 5715360.

The previous prime is 8664613. The next prime is 8664661. The reversal of 8664651 is 1564668.

8664651 is a `hidden beast` number, since 8 + 6 + 646 + 5 + 1 = 666.

It is not a de Polignac number, because 8664651 - 2¹⁴ = 8648267 is a prime.

8664651 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8664661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43885 + ... + 44081.

It is an arithmetic number, because the mean of its divisors is an integer number (546546).

Almost surely, 2^8664651 is an apocalyptic number.

8664651 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

8664651 is a deficient number, since it is larger than the sum of its proper divisors (4452453).

8664651 is a wasteful number, since it uses less digits than its factorization.

8664651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 381 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 8664651 is about 2943.5779249070. The cubic root of 8664651 is about 205.3920793030.

The spelling of 8664651 in words is "eight million, six hundred sixty-four thousand, six hundred fifty-one".