66412873558 has 8 divisors (see below), whose sum is σ = 101498920128. Its totient is φ = 32579900184.

The previous prime is 66412873547. The next prime is 66412873559. The reversal of 66412873558 is 85537821466.

It is a happy number.

66412873558 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 66412873499 and 66412873508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66412873559) 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, 313268166 + ... + 313268377.

It is an arithmetic number, because the mean of its divisors is an integer number (12687365016).

Almost surely, 2^66412873558 is an apocalyptic number.

66412873558 is a deficient number, since it is larger than the sum of its proper divisors (35086046570).

66412873558 is a wasteful number, since it uses less digits than its factorization.

66412873558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626536598.

The product of its digits is 9676800, while the sum is 55.

The spelling of 66412873558 in words is "sixty-six billion, four hundred twelve million, eight hundred seventy-three thousand, five hundred fifty-eight".