6669966 has 8 divisors (see below), whose sum is σ = 13339944. Its totient is φ = 2223320.

The previous prime is 6669961. The next prime is 6669973. The reversal of 6669966 is 6699666.

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

6669966 is an admirable number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669961) 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, 555825 + ... + 555836.

It is an arithmetic number, because the mean of its divisors is an integer number (1667493).

Almost surely, 2^6669966 is an apocalyptic number.

6669966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6669966 is a wasteful number, since it uses less digits than its factorization.

6669966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111666.

The product of its digits is 629856, while the sum is 48.

The square root of 6669966 is about 2582.6277315943. The cubic root of 6669966 is about 188.2382485711.

The spelling of 6669966 in words is "six million, six hundred sixty-nine thousand, nine hundred sixty-six".