6664567 has 8 divisors (see below), whose sum is σ = 8202656. Its totient is φ = 5272992.

The previous prime is 6664547. The next prime is 6664571. The reversal of 6664567 is 7654666.

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

It is a cyclic number.

It is not a de Polignac number, because 6664567 - 2¹⁹ = 6140279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664517) 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, 36528 + ... + 36709.

It is an arithmetic number, because the mean of its divisors is an integer number (1025332).

Almost surely, 2^6664567 is an apocalyptic number.

6664567 is a deficient number, since it is larger than the sum of its proper divisors (1538089).

6664567 is a wasteful number, since it uses less digits than its factorization.

6664567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73257.

The product of its digits is 181440, while the sum is 40.

The square root of 6664567 is about 2581.5822667504. The cubic root of 6664567 is about 188.1874450817.

Subtracting 6664567 from its reverse (7654666), we obtain a palindrome (990099).

The spelling of 6664567 in words is "six million, six hundred sixty-four thousand, five hundred sixty-seven".