66004456123 has 16 divisors (see below), whose sum is σ = 66763872000. Its totient is φ = 65250044640.

The previous prime is 66004456109. The next prime is 66004456153. The reversal of 66004456123 is 32165440066.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66004456123 is a prime.

It is a super-2 number, since 2×66004456123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66004456153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52425468 + ... + 52426726.

It is an arithmetic number, because the mean of its divisors is an integer number (4172742000).

Almost surely, 2^66004456123 is an apocalyptic number.

66004456123 is a deficient number, since it is larger than the sum of its proper divisors (759415877).

66004456123 is a wasteful number, since it uses less digits than its factorization.

66004456123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 66004456123 its reverse (32165440066), we get a palindrome (98169896189).

The spelling of 66004456123 in words is "sixty-six billion, four million, four hundred fifty-six thousand, one hundred twenty-three".