6664615 has 8 divisors (see below), whose sum is σ = 8075808. Its totient is φ = 5279520.

The previous prime is 6664607. The next prime is 6664631. The reversal of 6664615 is 5164666.

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

It is not a de Polignac number, because 6664615 - 2³ = 6664607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5956 + ... + 6985.

It is an arithmetic number, because the mean of its divisors is an integer number (1009476).

Almost surely, 2^6664615 is an apocalyptic number.

6664615 is a deficient number, since it is larger than the sum of its proper divisors (1411193).

6664615 is a wasteful number, since it uses less digits than its factorization.

6664615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13049.

The product of its digits is 25920, while the sum is 34.

The square root of 6664615 is about 2581.5915633578. The cubic root of 6664615 is about 188.1878968728.

The spelling of 6664615 in words is "six million, six hundred sixty-four thousand, six hundred fifteen".