6620402113673 has 2 divisors, whose sum is σ = 6620402113674. Its totient is φ = 6620402113672.

The previous prime is 6620402113597. The next prime is 6620402113763. The reversal of 6620402113673 is 3763112040266.

Together with next prime (6620402113763) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3539225726089 + 3081176387584 = 1881283^2 + 1755328^2 .

It is a cyclic number.

It is not a de Polignac number, because 6620402113673 - 2¹⁴ = 6620402097289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6620402113673.

It is not a weakly prime, because it can be changed into another prime (6620402113573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310201056836 + 3310201056837.

It is an arithmetic number, because the mean of its divisors is an integer number (3310201056837).

Almost surely, 2^{6620402113673} is an apocalyptic number.

It is an amenable number.

6620402113673 is a deficient number, since it is larger than the sum of its proper divisors (1).

6620402113673 is an equidigital number, since it uses as much as digits as its factorization.

6620402113673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 41.

The spelling of 6620402113673 in words is "six trillion, six hundred twenty billion, four hundred two million, one hundred thirteen thousand, six hundred seventy-three".