6619363997 has 2 divisors, whose sum is σ = 6619363998. Its totient is φ = 6619363996.

The previous prime is 6619363951. The next prime is 6619364027. The reversal of 6619363997 is 7993639166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3821588761 + 2797775236 = 61819^2 + 52894^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6619363997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6619363937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3309681998 + 3309681999.

It is an arithmetic number, because the mean of its divisors is an integer number (3309681999).

Almost surely, 2^6619363997 is an apocalyptic number.

It is an amenable number.

6619363997 is a deficient number, since it is larger than the sum of its proper divisors (1).

6619363997 is an equidigital number, since it uses as much as digits as its factorization.

6619363997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9920232, while the sum is 59.

The square root of 6619363997 is about 81359.4739228321. The cubic root of 6619363997 is about 1877.6101363817.

The spelling of 6619363997 in words is "six billion, six hundred nineteen million, three hundred sixty-three thousand, nine hundred ninety-seven".