6626206661 has 16 divisors (see below), whose sum is σ = 7073581440. Its totient is φ = 6189281280.

The previous prime is 6626206627. The next prime is 6626206667. The reversal of 6626206661 is 1666026266.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6626206661 is a prime.

It is a super-2 number, since 2×6626206661² = 87813229428561537842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6626206667) 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 15 ways as a sum of consecutive naturals, for example, 406376 + ... + 422366.

It is an arithmetic number, because the mean of its divisors is an integer number (442098840).

Almost surely, 2^6626206661 is an apocalyptic number.

It is an amenable number.

6626206661 is a deficient number, since it is larger than the sum of its proper divisors (447374779).

6626206661 is a wasteful number, since it uses less digits than its factorization.

6626206661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16316.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 6626206661 is about 81401.5151026073. The cubic root of 6626206661 is about 1878.2568969437.

The spelling of 6626206661 in words is "six billion, six hundred twenty-six million, two hundred six thousand, six hundred sixty-one".