669081606 has 8 divisors (see below), whose sum is σ = 1338163224. Its totient is φ = 223027200.

The previous prime is 669081577. The next prime is 669081607. The reversal of 669081606 is 606180966.

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

669081606 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669081607) 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, 55756795 + ... + 55756806.

It is an arithmetic number, because the mean of its divisors is an integer number (167270403).

Almost surely, 2^669081606 is an apocalyptic number.

669081606 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.

669081606 is a wasteful number, since it uses less digits than its factorization.

669081606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111513606.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 669081606 is about 25866.6117997700. The cubic root of 669081606 is about 874.6340155404.

The spelling of 669081606 in words is "six hundred sixty-nine million, eighty-one thousand, six hundred six".