6620406411 has 32 divisors (see below), whose sum is σ = 9512875008. Its totient is φ = 4084629120.

The previous prime is 6620406391. The next prime is 6620406413. The reversal of 6620406411 is 1146040266.

It is not a de Polignac number, because 6620406411 - 2⁹ = 6620405899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6620406413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 454930 + ... + 469256.

It is an arithmetic number, because the mean of its divisors is an integer number (297277344).

Almost surely, 2^6620406411 is an apocalyptic number.

6620406411 is a deficient number, since it is larger than the sum of its proper divisors (2892468597).

6620406411 is a wasteful number, since it uses less digits than its factorization.

6620406411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14571.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 6620406411 is about 81365.8798944619. The cubic root of 6620406411 is about 1877.7086928976.

Adding to 6620406411 its reverse (1146040266), we get a palindrome (7766446677).

The spelling of 6620406411 in words is "six billion, six hundred twenty million, four hundred six thousand, four hundred eleven".