6639396306 has 8 divisors (see below), whose sum is σ = 13278792624. Its totient is φ = 2213132100.

The previous prime is 6639396301. The next prime is 6639396307. The reversal of 6639396306 is 6036939366.

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

6639396306 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (6639396301) 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, 553283020 + ... + 553283031.

It is an arithmetic number, because the mean of its divisors is an integer number (1659849078).

Almost surely, 2^6639396306 is an apocalyptic number.

6639396306 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.

6639396306 is a wasteful number, since it uses less digits than its factorization.

6639396306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106566056.

The product of its (nonzero) digits is 2834352, while the sum is 51.

The square root of 6639396306 is about 81482.4907940350. The cubic root of 6639396306 is about 1879.5023114843.

The spelling of 6639396306 in words is "six billion, six hundred thirty-nine million, three hundred ninety-six thousand, three hundred six".