66916823334 has 8 divisors (see below), whose sum is σ = 133833646680. Its totient is φ = 22305607776.

The previous prime is 66916823317. The next prime is 66916823357. The reversal of 66916823334 is 43332861966.

It is a happy number.

66916823334 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.

66916823334 is an admirable number.

It is a super-2 number, since 2×66916823334² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5576401939 + ... + 5576401950.

It is an arithmetic number, because the mean of its divisors is an integer number (16729205835).

Almost surely, 2^66916823334 is an apocalyptic number.

66916823334 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66916823334 is a wasteful number, since it uses less digits than its factorization.

66916823334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11152803894.

The product of its digits is 3359232, while the sum is 51.

The spelling of 66916823334 in words is "sixty-six billion, nine hundred sixteen million, eight hundred twenty-three thousand, three hundred thirty-four".