6566630399 has 16 divisors (see below), whose sum is σ = 7796044800. Its totient is φ = 5411674464.

The previous prime is 6566630351. The next prime is 6566630471. The reversal of 6566630399 is 9930366656.

It is a de Polignac number, because none of the positive numbers 2^k-6566630399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6566630399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566630699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19157 + ... + 116190.

It is an arithmetic number, because the mean of its divisors is an integer number (487252800).

Almost surely, 2^6566630399 is an apocalyptic number.

6566630399 is a deficient number, since it is larger than the sum of its proper divisors (1229414401).

6566630399 is a wasteful number, since it uses less digits than its factorization.

6566630399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135622.

The product of its (nonzero) digits is 4723920, while the sum is 53.

The square root of 6566630399 is about 81034.7480961100. The cubic root of 6566630399 is about 1872.6108021228.

The spelling of 6566630399 in words is "six billion, five hundred sixty-six million, six hundred thirty thousand, three hundred ninety-nine".