6631403969 has 2 divisors, whose sum is σ = 6631403970. Its totient is φ = 6631403968.

The previous prime is 6631403941. The next prime is 6631404007. The reversal of 6631403969 is 9693041366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5463131569 + 1168272400 = 73913^2 + 34180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6631403969 is a prime.

It is a super-2 number, since 2×6631403969² = 87951037200137905922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6631403869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3315701984 + 3315701985.

It is an arithmetic number, because the mean of its divisors is an integer number (3315701985).

Almost surely, 2^6631403969 is an apocalyptic number.

It is an amenable number.

6631403969 is a deficient number, since it is larger than the sum of its proper divisors (1).

6631403969 is an equidigital number, since it uses as much as digits as its factorization.

6631403969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 47.

The square root of 6631403969 is about 81433.4327472445. The cubic root of 6631403969 is about 1878.7478429174.

The spelling of 6631403969 in words is "six billion, six hundred thirty-one million, four hundred three thousand, nine hundred sixty-nine".