664342144567 has 4 divisors (see below), whose sum is σ = 664344355480. Its totient is φ = 664339933656.

The previous prime is 664342144561. The next prime is 664342144603. The reversal of 664342144567 is 765441243466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 664342144567 - 2¹⁵ = 664342111799 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 (664342144561) 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, 567453 + ... + 1284790.

It is an arithmetic number, because the mean of its divisors is an integer number (166086088870).

Almost surely, 2^664342144567 is an apocalyptic number.

664342144567 is a deficient number, since it is larger than the sum of its proper divisors (2210913).

664342144567 is a wasteful number, since it uses less digits than its factorization.

664342144567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2210912.

The product of its digits is 11612160, while the sum is 52.

The spelling of 664342144567 in words is "six hundred sixty-four billion, three hundred forty-two million, one hundred forty-four thousand, five hundred sixty-seven".