768686650066 has 8 divisors (see below), whose sum is σ = 1157192539020. Its totient is φ = 382955803728.

The previous prime is 768686650057. The next prime is 768686650139. The reversal of 768686650066 is 660056686867.

It can be written as a sum of positive squares in 2 ways, for example, as 753040392841 + 15646257225 = 867779^2 + 125085^2 .

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

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, 693759961 + ... + 693761068.

Almost surely, 2^768686650066 is an apocalyptic number.

768686650066 is a deficient number, since it is larger than the sum of its proper divisors (388505888954).

768686650066 is a wasteful number, since it uses less digits than its factorization.

768686650066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387521308.

The product of its (nonzero) digits is 104509440, while the sum is 64.

The spelling of 768686650066 in words is "seven hundred sixty-eight billion, six hundred eighty-six million, six hundred fifty thousand, sixty-six".