66766866766 has 8 divisors (see below), whose sum is σ = 100152871344. Its totient is φ = 33382576320.

The previous prime is 66766866697. The next prime is 66766866797.

66766866766 is nontrivially palindromic in base 10.

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 = 66766866695 and 66766866704.

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, 326275 + ... + 489886.

It is an arithmetic number, because the mean of its divisors is an integer number (12519108918).

Almost surely, 2^66766866766 is an apocalyptic number.

66766866766 is a deficient number, since it is larger than the sum of its proper divisors (33386004578).

66766866766 is a wasteful number, since it uses less digits than its factorization.

66766866766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857066.

The product of its digits is 658409472, while the sum is 70.

The spelling of 66766866766 in words is "sixty-six billion, seven hundred sixty-six million, eight hundred sixty-six thousand, seven hundred sixty-six".