664776457010143 has 4 divisors (see below), whose sum is σ = 664777921526368. Its totient is φ = 664774992493920.

The previous prime is 664776457010123. The next prime is 664776457010161. The reversal of 664776457010143 is 341010754677466.

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-664776457010143 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 (664776457010123) 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, 731577018 + ... + 732485143.

It is an arithmetic number, because the mean of its divisors is an integer number (166194480381592).

Almost surely, 2^{664776457010143} is an apocalyptic number.

664776457010143 is a deficient number, since it is larger than the sum of its proper divisors (1464516225).

664776457010143 is a wasteful number, since it uses less digits than its factorization.

664776457010143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464516224.

The product of its (nonzero) digits is 71124480, while the sum is 61.

The spelling of 664776457010143 in words is "six hundred sixty-four trillion, seven hundred seventy-six billion, four hundred fifty-seven million, ten thousand, one hundred forty-three".