6407660397629 has 2 divisors, whose sum is σ = 6407660397630. Its totient is φ = 6407660397628.

The previous prime is 6407660397571. The next prime is 6407660397643. The reversal of 6407660397629 is 9267930667046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4180074297529 + 2227586100100 = 2044523^2 + 1492510^2 .

It is a cyclic number.

It is not a de Polignac number, because 6407660397629 - 2⁸ = 6407660397373 is a prime.

It is a super-2 number, since 2×6407660397629² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6407660397029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203830198814 + 3203830198815.

It is an arithmetic number, because the mean of its divisors is an integer number (3203830198815).

Almost surely, 2^{6407660397629} is an apocalyptic number.

It is an amenable number.

6407660397629 is a deficient number, since it is larger than the sum of its proper divisors (1).

6407660397629 is an equidigital number, since it uses as much as digits as its factorization.

6407660397629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123451776, while the sum is 65.

The spelling of 6407660397629 in words is "six trillion, four hundred seven billion, six hundred sixty million, three hundred ninety-seven thousand, six hundred twenty-nine".