6618358228689 has 9 divisors (see below), whose sum is σ = 9559861922793. Its totient is φ = 4412233673892.

The previous prime is 6618358228583. The next prime is 6618358228717. The reversal of 6618358228689 is 9868228538166.

The square root of 6618358228689 is 2572617.

It is a perfect power (a square), and thus also a powerful number.

6618358228689 is a `hidden beast` number, since 6 + 6 + 18 + 3 + 582 + 28 + 6 + 8 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 6618358228689 - 2⁷ = 6618358228561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6618358628689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7289082 + ... + 8146620.

Almost surely, 2^{6618358228689} is an apocalyptic number.

6618358228689 is the 2572617-th square number.

6618358228689 is the 1286309-th centered octagonal number.

It is an amenable number.

6618358228689 is a deficient number, since it is larger than the sum of its proper divisors (2941503694104).

6618358228689 is an frugal number, since it uses more digits than its factorization.

6618358228689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715084 (or 857542 counting only the distinct ones).

The product of its digits is 477757440, while the sum is 72.

The spelling of 6618358228689 in words is "six trillion, six hundred eighteen billion, three hundred fifty-eight million, two hundred twenty-eight thousand, six hundred eighty-nine".