6655728619 has 2 divisors, whose sum is σ = 6655728620. Its totient is φ = 6655728618.

The previous prime is 6655728559. The next prime is 6655728731. The reversal of 6655728619 is 9168275566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6655728619 - 2¹⁷ = 6655597547 is a prime.

It is a super-2 number, since 2×6655728619² = 88597446899551294322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6655728619.

It is not a weakly prime, because it can be changed into another prime (6655728319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3327864309 + 3327864310.

It is an arithmetic number, because the mean of its divisors is an integer number (3327864310).

Almost surely, 2^6655728619 is an apocalyptic number.

6655728619 is a deficient number, since it is larger than the sum of its proper divisors (1).

6655728619 is an equidigital number, since it uses as much as digits as its factorization.

6655728619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 55.

The square root of 6655728619 is about 81582.6490070039. The cubic root of 6655728619 is about 1881.0421846225.

The spelling of 6655728619 in words is "six billion, six hundred fifty-five million, seven hundred twenty-eight thousand, six hundred nineteen".