8640667 has 8 divisors (see below), whose sum is σ = 9893600. Its totient is φ = 7392384.

The previous prime is 8640601. The next prime is 8640679. The reversal of 8640667 is 7660468.

8640667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8640667 is a prime.

It is a super-2 number, since 2×8640667² = 149322252409778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8640767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5059 + ... + 6547.

It is an arithmetic number, because the mean of its divisors is an integer number (1236700).

Almost surely, 2^8640667 is an apocalyptic number.

8640667 is a deficient number, since it is larger than the sum of its proper divisors (1252933).

8640667 is a wasteful number, since it uses less digits than its factorization.

8640667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 8640667 is about 2939.5011481542. The cubic root of 8640667 is about 205.2023938077.

The spelling of 8640667 in words is "eight million, six hundred forty thousand, six hundred sixty-seven".