6618358228690 has 48 divisors (see below), whose sum is σ = 12900357856008. Its totient is φ = 2443619363328.

The previous prime is 6618358228583. The next prime is 6618358228717. The reversal of 6618358228690 is 968228538166.

It is a Cunningham number, because it is equal to 2572617²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 37240122529 + 6581118106161 = 192977^2 + 2565369^2 .

It is a super-2 number, since 2×6618358228690² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 76738672 + ... + 76824868.

Almost surely, 2^{6618358228690} is an apocalyptic number.

6618358228690 is a deficient number, since it is larger than the sum of its proper divisors (6281999627318).

6618358228690 is a wasteful number, since it uses less digits than its factorization.

6618358228690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131663 (or 131650 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 64.

The spelling of 6618358228690 in words is "six trillion, six hundred eighteen billion, three hundred fifty-eight million, two hundred twenty-eight thousand, six hundred ninety".