6663959 has 8 divisors (see below), whose sum is σ = 6876480. Its totient is φ = 6453216.

The previous prime is 6663941. The next prime is 6663961. The reversal of 6663959 is 9593666.

6663959 is digitally balanced in base 3, 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 not a de Polignac number, because 6663959 - 2²⁰ = 5615383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660959) 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, 14162 + ... + 14624.

It is an arithmetic number, because the mean of its divisors is an integer number (859560).

Almost surely, 2^6663959 is an apocalyptic number.

6663959 is a deficient number, since it is larger than the sum of its proper divisors (212521).

6663959 is a wasteful number, since it uses less digits than its factorization.

6663959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889.

The product of its digits is 262440, while the sum is 44.

The square root of 6663959 is about 2581.4645068255. The cubic root of 6663959 is about 188.1817222070.

The spelling of 6663959 in words is "six million, six hundred sixty-three thousand, nine hundred fifty-nine".