6639350372 has 12 divisors (see below), whose sum is σ = 11638199916. Its totient is φ = 3314150400.

The previous prime is 6639350353. The next prime is 6639350401. The reversal of 6639350372 is 2730539366.

It can be written as a sum of positive squares in 2 ways, for example, as 4550311936 + 2089038436 = 67456^2 + 45706^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1378493 + ... + 1383300.

It is an arithmetic number, because the mean of its divisors is an integer number (969849993).

Almost surely, 2^6639350372 is an apocalyptic number.

It is an amenable number.

6639350372 is a deficient number, since it is larger than the sum of its proper divisors (4998849544).

6639350372 is a wasteful number, since it uses less digits than its factorization.

6639350372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762398 (or 2762396 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 44.

The square root of 6639350372 is about 81482.2089293117. The cubic root of 6639350372 is about 1879.4979770913.

The spelling of 6639350372 in words is "six billion, six hundred thirty-nine million, three hundred fifty thousand, three hundred seventy-two".