6662616421319 has 2 divisors, whose sum is σ = 6662616421320. Its totient is φ = 6662616421318.

The previous prime is 6662616421303. The next prime is 6662616421339. The reversal of 6662616421319 is 9131246162666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6662616421319 - 2⁴ = 6662616421303 is a prime.

It is a super-2 number, since 2×6662616421319² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6662616421339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331308210659 + 3331308210660.

It is an arithmetic number, because the mean of its divisors is an integer number (3331308210660).

Almost surely, 2^{6662616421319} is an apocalyptic number.

6662616421319 is a deficient number, since it is larger than the sum of its proper divisors (1).

6662616421319 is an equidigital number, since it uses as much as digits as its factorization.

6662616421319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3359232, while the sum is 53.

The spelling of 6662616421319 in words is "six trillion, six hundred sixty-two billion, six hundred sixteen million, four hundred twenty-one thousand, three hundred nineteen".