6613252621457 has 2 divisors, whose sum is σ = 6613252621458. Its totient is φ = 6613252621456.

The previous prime is 6613252621453. The next prime is 6613252621477. The reversal of 6613252621457 is 7541262523166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6601862609281 + 11390012176 = 2569409^2 + 106724^2 .

It is a cyclic number.

It is not a de Polignac number, because 6613252621457 - 2² = 6613252621453 is a prime.

It is a super-2 number, since 2×6613252621457² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6613252621453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3306626310728 + 3306626310729.

It is an arithmetic number, because the mean of its divisors is an integer number (3306626310729).

Almost surely, 2^{6613252621457} is an apocalyptic number.

It is an amenable number.

6613252621457 is a deficient number, since it is larger than the sum of its proper divisors (1).

6613252621457 is an equidigital number, since it uses as much as digits as its factorization.

6613252621457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 50.

The spelling of 6613252621457 in words is "six trillion, six hundred thirteen billion, two hundred fifty-two million, six hundred twenty-one thousand, four hundred fifty-seven".