6626881 has 2 divisors, whose sum is σ = 6626882. Its totient is φ = 6626880.

The previous prime is 6626863. The next prime is 6626887. The reversal of 6626881 is 1886266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6548481 + 78400 = 2559^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 6626881 - 2⁵ = 6626849 is a prime.

It is a super-2 number, since 2×6626881² = 87831103576322, 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 6626881.

It is not a weakly prime, because it can be changed into another prime (6626887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3313440 + 3313441.

It is an arithmetic number, because the mean of its divisors is an integer number (3313441).

Almost surely, 2^6626881 is an apocalyptic number.

It is an amenable number.

6626881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6626881 is an equidigital number, since it uses as much as digits as its factorization.

6626881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 37.

The square root of 6626881 is about 2574.2729070555. The cubic root of 6626881 is about 187.8320610567.

The spelling of 6626881 in words is "six million, six hundred twenty-six thousand, eight hundred eighty-one".