66783038766 has 8 divisors (see below), whose sum is σ = 133566077544. Its totient is φ = 22261012920.

The previous prime is 66783038753. The next prime is 66783038813.

66783038766 is nontrivially palindromic in base 10.

66783038766 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.

66783038766 is an admirable 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, 5565253225 + ... + 5565253236.

It is an arithmetic number, because the mean of its divisors is an integer number (16695759693).

Almost surely, 2^66783038766 is an apocalyptic number.

66783038766 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.

66783038766 is a wasteful number, since it uses less digits than its factorization.

66783038766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11130506466.

The product of its (nonzero) digits is 36578304, while the sum is 60.

The spelling of 66783038766 in words is "sixty-six billion, seven hundred eighty-three million, thirty-eight thousand, seven hundred sixty-six".