6621848390473 has 2 divisors, whose sum is σ = 6621848390474. Its totient is φ = 6621848390472.

The previous prime is 6621848390453. The next prime is 6621848390561. The reversal of 6621848390473 is 3740938481266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5738722086969 + 883126303504 = 2395563^2 + 939748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6621848390473 is a prime.

It is a super-2 number, since 2×6621848390473² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6621848390453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3310924195236 + 3310924195237.

It is an arithmetic number, because the mean of its divisors is an integer number (3310924195237).

Almost surely, 2^{6621848390473} is an apocalyptic number.

It is an amenable number.

6621848390473 is a deficient number, since it is larger than the sum of its proper divisors (1).

6621848390473 is an equidigital number, since it uses as much as digits as its factorization.

6621848390473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 61.

The spelling of 6621848390473 in words is "six trillion, six hundred twenty-one billion, eight hundred forty-eight million, three hundred ninety thousand, four hundred seventy-three".