6620951 has 2 divisors, whose sum is σ = 6620952. Its totient is φ = 6620950.

The previous prime is 6620947. The next prime is 6620953. The reversal of 6620951 is 1590266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6620951 - 2² = 6620947 is a prime.

Together with 6620953, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6620953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310475 + 3310476.

It is an arithmetic number, because the mean of its divisors is an integer number (3310476).

Almost surely, 2^6620951 is an apocalyptic number.

6620951 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620951 is an equidigital number, since it uses as much as digits as its factorization.

6620951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 6620951 is about 2573.1208677402. The cubic root of 6620951 is about 187.7760177726.

The spelling of 6620951 in words is "six million, six hundred twenty thousand, nine hundred fifty-one".