664143505341467 has 4 divisors (see below), whose sum is σ = 664143560987496. Its totient is φ = 664143449695440.

The previous prime is 664143505341451. The next prime is 664143505341469. The reversal of 664143505341467 is 764143505341466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 664143505341467 - 2⁴ = 664143505341451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664143505341469) 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, 1818953 + ... + 36491034.

It is an arithmetic number, because the mean of its divisors is an integer number (166035890246874).

Almost surely, 2^{664143505341467} is an apocalyptic number.

664143505341467 is a deficient number, since it is larger than the sum of its proper divisors (55646029).

664143505341467 is a wasteful number, since it uses less digits than its factorization.

664143505341467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55646028.

The product of its (nonzero) digits is 87091200, while the sum is 59.

Subtracting 664143505341467 from its reverse (764143505341466), we obtain a palindrome (99999999999999).

The spelling of 664143505341467 in words is "six hundred sixty-four trillion, one hundred forty-three billion, five hundred five million, three hundred forty-one thousand, four hundred sixty-seven".