660745064447 has 8 divisors (see below), whose sum is σ = 720144760944. Its totient is φ = 602570104128.

The previous prime is 660745064431. The next prime is 660745064519. The reversal of 660745064447 is 744460547066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 660745064447 - 2⁴ = 660745064431 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 (660745064407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306182918 + ... + 306185075.

It is an arithmetic number, because the mean of its divisors is an integer number (90018095118).

Almost surely, 2^660745064447 is an apocalyptic number.

660745064447 is a deficient number, since it is larger than the sum of its proper divisors (59399696497).

660745064447 is a wasteful number, since it uses less digits than its factorization.

660745064447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612368089.

The product of its (nonzero) digits is 13547520, while the sum is 53.

The spelling of 660745064447 in words is "six hundred sixty billion, seven hundred forty-five million, sixty-four thousand, four hundred forty-seven".