664867981743 has 16 divisors (see below), whose sum is σ = 1072728172800. Its totient is φ = 357576057216.

The previous prime is 664867981697. The next prime is 664867981759. The reversal of 664867981743 is 347189768466.

It is not a de Polignac number, because 664867981743 - 2¹² = 664867977647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664867981243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 931187293 + ... + 931188006.

It is an arithmetic number, because the mean of its divisors is an integer number (67045510800).

Almost surely, 2^664867981743 is an apocalyptic number.

664867981743 is a deficient number, since it is larger than the sum of its proper divisors (407860191057).

664867981743 is a wasteful number, since it uses less digits than its factorization.

664867981743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862375326.

The product of its digits is 292626432, while the sum is 69.

The spelling of 664867981743 in words is "six hundred sixty-four billion, eight hundred sixty-seven million, nine hundred eighty-one thousand, seven hundred forty-three".