664743347467 has 8 divisors (see below), whose sum is σ = 703920227472. Its totient is φ = 625574726400.

The previous prime is 664743347447. The next prime is 664743347491. The reversal of 664743347467 is 764743347466.

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 664743347467 - 2¹⁹ = 664742823179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664743347407) 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, 1898634 + ... + 2221327.

It is an arithmetic number, because the mean of its divisors is an integer number (87990028434).

Almost surely, 2^664743347467 is an apocalyptic number.

664743347467 is a deficient number, since it is larger than the sum of its proper divisors (39176880005).

664743347467 is a wasteful number, since it uses less digits than its factorization.

664743347467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4129469.

The product of its digits is 170698752, while the sum is 61.

Subtracting 664743347467 from its reverse (764743347466), we obtain a palindrome (99999999999).

The spelling of 664743347467 in words is "six hundred sixty-four billion, seven hundred forty-three million, three hundred forty-seven thousand, four hundred sixty-seven".