6669638606 has 4 divisors (see below), whose sum is σ = 10004457912. Its totient is φ = 3334819302.

The previous prime is 6669638603. The next prime is 6669638639. The reversal of 6669638606 is 6068369666.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6669638603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1667409650 + ... + 1667409653.

It is an arithmetic number, because the mean of its divisors is an integer number (2501114478).

Almost surely, 2^6669638606 is an apocalyptic number.

6669638606 is a deficient number, since it is larger than the sum of its proper divisors (3334819306).

6669638606 is a wasteful number, since it uses less digits than its factorization.

6669638606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3334819305.

The product of its (nonzero) digits is 10077696, while the sum is 56.

The square root of 6669638606 is about 81667.8554022328. The cubic root of 6669638606 is about 1882.3516864130.

The spelling of 6669638606 in words is "six billion, six hundred sixty-nine million, six hundred thirty-eight thousand, six hundred six".