6615960993451 has 2 divisors, whose sum is σ = 6615960993452. Its totient is φ = 6615960993450.

The previous prime is 6615960993437. The next prime is 6615960993463. The reversal of 6615960993451 is 1543990695166.

6615960993451 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6615960993451 - 2¹¹ = 6615960991403 is a prime.

It is not a weakly prime, because it can be changed into another prime (6615960994451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3307980496725 + 3307980496726.

It is an arithmetic number, because the mean of its divisors is an integer number (3307980496726).

Almost surely, 2^{6615960993451} is an apocalyptic number.

6615960993451 is a deficient number, since it is larger than the sum of its proper divisors (1).

6615960993451 is an equidigital number, since it uses as much as digits as its factorization.

6615960993451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47239200, while the sum is 64.

The spelling of 6615960993451 in words is "six trillion, six hundred fifteen billion, nine hundred sixty million, nine hundred ninety-three thousand, four hundred fifty-one".