6626861 has 2 divisors, whose sum is σ = 6626862. Its totient is φ = 6626860.

The previous prime is 6626849. The next prime is 6626863. The reversal of 6626861 is 1686266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6405961 + 220900 = 2531^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 6626861 - 2⁶ = 6626797 is a prime.

Together with 6626863, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₄₅₂₈₇₉ and since 6626861 and 452879 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6626863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3313430 + 3313431.

It is an arithmetic number, because the mean of its divisors is an integer number (3313431).

Almost surely, 2^6626861 is an apocalyptic number.

It is an amenable number.

6626861 is a deficient number, since it is larger than the sum of its proper divisors (1).

6626861 is an equidigital number, since it uses as much as digits as its factorization.

6626861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 6626861 is about 2574.2690224606. The cubic root of 6626861 is about 187.8318720968.

The spelling of 6626861 in words is "six million, six hundred twenty-six thousand, eight hundred sixty-one".