6631493797 has 2 divisors, whose sum is σ = 6631493798. Its totient is φ = 6631493796.

The previous prime is 6631493777. The next prime is 6631493821. The reversal of 6631493797 is 7973941366.

It is a happy number.

6631493797 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4272060321 + 2359433476 = 65361^2 + 48574^2 .

It is a cyclic number.

It is not a de Polignac number, because 6631493797 - 2²³ = 6623105189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6631493707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3315746898 + 3315746899.

It is an arithmetic number, because the mean of its divisors is an integer number (3315746899).

Almost surely, 2^6631493797 is an apocalyptic number.

It is an amenable number.

6631493797 is a deficient number, since it is larger than the sum of its proper divisors (1).

6631493797 is an equidigital number, since it uses as much as digits as its factorization.

6631493797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 55.

The square root of 6631493797 is about 81433.9842878881. The cubic root of 6631493797 is about 1878.7563259576.

The spelling of 6631493797 in words is "six billion, six hundred thirty-one million, four hundred ninety-three thousand, seven hundred ninety-seven".