6626869861 has 2 divisors, whose sum is σ = 6626869862. Its totient is φ = 6626869860.

The previous prime is 6626869829. The next prime is 6626869877. The reversal of 6626869861 is 1689686266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4688140900 + 1938728961 = 68470^2 + 44031^2 .

It is a cyclic number.

It is not a de Polignac number, because 6626869861 - 2⁵ = 6626869829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6626869796 and 6626869805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6626869661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3313434930 + 3313434931.

It is an arithmetic number, because the mean of its divisors is an integer number (3313434931).

Almost surely, 2^6626869861 is an apocalyptic number.

It is an amenable number.

6626869861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6626869861 is an equidigital number, since it uses as much as digits as its factorization.

6626869861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8957952, while the sum is 58.

The square root of 6626869861 is about 81405.5886349334. The cubic root of 6626869861 is about 1878.3195581556.

The spelling of 6626869861 in words is "six billion, six hundred twenty-six million, eight hundred sixty-nine thousand, eight hundred sixty-one".