664056744001 has 6 divisors (see below), whose sum is σ = 772474171650. Its totient is φ = 569191494816.

The previous prime is 664056743983. The next prime is 664056744023. The reversal of 664056744001 is 100447650466.

It can be written as a sum of positive squares in only one way, i.e., 662394143376 + 1662600625 = 813876^2 + 40775^2 .

It is a de Polignac number, because none of the positive numbers 2^k-664056744001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664056744061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6776089176 + ... + 6776089273.

It is an arithmetic number, because the mean of its divisors is an integer number (128745695275).

Almost surely, 2^664056744001 is an apocalyptic number.

It is an amenable number.

664056744001 is a deficient number, since it is larger than the sum of its proper divisors (108417427649).

664056744001 is a wasteful number, since it uses less digits than its factorization.

664056744001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13552178463 (or 13552178456 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 664056744001 in words is "six hundred sixty-four billion, fifty-six million, seven hundred forty-four thousand, one".