56665063345447 has 4 divisors (see below), whose sum is σ = 56671089629800. Its totient is φ = 56659037061096.

The previous prime is 56665063345433. The next prime is 56665063345453. The reversal of 56665063345447 is 74454336056665.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56665063345447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56665063345487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3013128072 + ... + 3013146877.

It is an arithmetic number, because the mean of its divisors is an integer number (14167772407450).

Almost surely, 2^{56665063345447} is an apocalyptic number.

56665063345447 is a deficient number, since it is larger than the sum of its proper divisors (6026284353).

56665063345447 is an equidigital number, since it uses as much as digits as its factorization.

56665063345447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6026284352.

The product of its (nonzero) digits is 653184000, while the sum is 64.

The spelling of 56665063345447 in words is "fifty-six trillion, six hundred sixty-five billion, sixty-three million, three hundred forty-five thousand, four hundred forty-seven".