64661424223 has 8 divisors (see below), whose sum is σ = 70564792320. Its totient is φ = 58762232280.

The previous prime is 64661424199. The next prime is 64661424227. The reversal of 64661424223 is 32242416646.

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 64661424223 - 2²⁵ = 64627869791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64661424227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011615 + ... + 1073632.

It is an arithmetic number, because the mean of its divisors is an integer number (8820599040).

Almost surely, 2^64661424223 is an apocalyptic number.

64661424223 is a deficient number, since it is larger than the sum of its proper divisors (5903368097).

64661424223 is a wasteful number, since it uses less digits than its factorization.

64661424223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088077.

The product of its digits is 331776, while the sum is 40.

It can be divided in two parts, 64661 and 424223, that added together give a palindrome (488884).

The spelling of 64661424223 in words is "sixty-four billion, six hundred sixty-one million, four hundred twenty-four thousand, two hundred twenty-three".