6639500522 has 8 divisors (see below), whose sum is σ = 9965668356. Its totient is φ = 3317611072.

The previous prime is 6639500519. The next prime is 6639500537. The reversal of 6639500522 is 2250059366.

It can be written as a sum of positive squares in 2 ways, for example, as 6551121721 + 88378801 = 80939^2 + 9401^2 .

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

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, 1065713 + ... + 1071924.

Almost surely, 2^6639500522 is an apocalyptic number.

6639500522 is a deficient number, since it is larger than the sum of its proper divisors (3326167834).

6639500522 is a wasteful number, since it uses less digits than its factorization.

6639500522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2139192.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 6639500522 is about 81483.1302908768. The cubic root of 6639500522 is about 1879.5121453697.

Adding to 6639500522 its reverse (2250059366), we get a palindrome (8889559888).

The spelling of 6639500522 in words is "six billion, six hundred thirty-nine million, five hundred thousand, five hundred twenty-two".