6659966 has 8 divisors (see below), whose sum is σ = 10334520. Its totient is φ = 3215128.

The previous prime is 6659957. The next prime is 6659977. The reversal of 6659966 is 6699566.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 6659966.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57356 + ... + 57471.

It is an arithmetic number, because the mean of its divisors is an integer number (1291815).

Almost surely, 2^6659966 is an apocalyptic number.

6659966 is a deficient number, since it is larger than the sum of its proper divisors (3674554).

6659966 is a wasteful number, since it uses less digits than its factorization.

6659966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114858.

The product of its digits is 524880, while the sum is 47.

The square root of 6659966 is about 2580.6909927382. The cubic root of 6659966 is about 188.1441289511.

The spelling of 6659966 in words is "six million, six hundred fifty-nine thousand, nine hundred sixty-six".