664774326141 has 4 divisors (see below), whose sum is σ = 886365768192. Its totient is φ = 443182884092.

The previous prime is 664774326103. The next prime is 664774326143. The reversal of 664774326141 is 141623477466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 664774326141 - 2²⁹ = 664237455229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664774326143) 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, 110795721021 + ... + 110795721026.

It is an arithmetic number, because the mean of its divisors is an integer number (221591442048).

Almost surely, 2^664774326141 is an apocalyptic number.

It is an amenable number.

664774326141 is a deficient number, since it is larger than the sum of its proper divisors (221591442051).

664774326141 is a wasteful number, since it uses less digits than its factorization.

664774326141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221591442050.

The product of its digits is 4064256, while the sum is 51.

The spelling of 664774326141 in words is "six hundred sixty-four billion, seven hundred seventy-four million, three hundred twenty-six thousand, one hundred forty-one".