6618667 has 4 divisors (see below), whose sum is σ = 7220376. Its totient is φ = 6016960.

The previous prime is 6618659. The next prime is 6618701. The reversal of 6618667 is 7668166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6618667 - 2³ = 6618659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6618617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300838 + ... + 300859.

It is an arithmetic number, because the mean of its divisors is an integer number (1805094).

Almost surely, 2^6618667 is an apocalyptic number.

6618667 is a deficient number, since it is larger than the sum of its proper divisors (601709).

6618667 is a wasteful number, since it uses less digits than its factorization.

6618667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601708.

The product of its digits is 72576, while the sum is 40.

The square root of 6618667 is about 2572.6770104310. The cubic root of 6618667 is about 187.7544232036.

The spelling of 6618667 in words is "six million, six hundred eighteen thousand, six hundred sixty-seven".