2664661199647 has 2 divisors, whose sum is σ = 2664661199648. Its totient is φ = 2664661199646.

The previous prime is 2664661199639. The next prime is 2664661199659. The reversal of 2664661199647 is 7469911664662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2664661199647 - 2³ = 2664661199639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2664661199747) 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, 1332330599823 + 1332330599824.

It is an arithmetic number, because the mean of its divisors is an integer number (1332330599824).

Almost surely, 2^{2664661199647} is an apocalyptic number.

2664661199647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2664661199647 is an equidigital number, since it uses as much as digits as its factorization.

2664661199647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141087744, while the sum is 67.

The spelling of 2664661199647 in words is "two trillion, six hundred sixty-four billion, six hundred sixty-one million, one hundred ninety-nine thousand, six hundred forty-seven".