6661264726063 has 24 divisors (see below), whose sum is σ = 7078786303680. Its totient is φ = 6266169687360.

The previous prime is 6661264726057. The next prime is 6661264726087. The reversal of 6661264726063 is 3606274621666.

It is a de Polignac number, because none of the positive numbers 2^k-6661264726063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6661264725995 and 6661264726013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661664726063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260365770 + ... + 260391352.

It is an arithmetic number, because the mean of its divisors is an integer number (294949429320).

Almost surely, 2^{6661264726063} is an apocalyptic number.

6661264726063 is a deficient number, since it is larger than the sum of its proper divisors (417521577617).

6661264726063 is a wasteful number, since it uses less digits than its factorization.

6661264726063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33759 (or 33736 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 55.

The spelling of 6661264726063 in words is "six trillion, six hundred sixty-one billion, two hundred sixty-four million, seven hundred twenty-six thousand, sixty-three".