66064531223 has 4 divisors (see below), whose sum is σ = 66089157288. Its totient is φ = 66039905160.

The previous prime is 66064531201. The next prime is 66064531237. The reversal of 66064531223 is 32213546066.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66064531223 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 (66064531243) 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, 12309008 + ... + 12314373.

It is an arithmetic number, because the mean of its divisors is an integer number (16522289322).

Almost surely, 2^66064531223 is an apocalyptic number.

66064531223 is a deficient number, since it is larger than the sum of its proper divisors (24626065).

66064531223 is a wasteful number, since it uses less digits than its factorization.

66064531223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24626064.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 66064531223 in words is "sixty-six billion, sixty-four million, five hundred thirty-one thousand, two hundred twenty-three".