786994808666 has 16 divisors (see below), whose sum is σ = 1287823367520. Its totient is φ = 357721112880.

The previous prime is 786994808651. The next prime is 786994808669. The reversal of 786994808666 is 666808499687.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (786994808669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3676100 + ... + 3884288.

It is an arithmetic number, because the mean of its divisors is an integer number (80488960470).

Almost surely, 2^786994808666 is an apocalyptic number.

786994808666 is a deficient number, since it is larger than the sum of its proper divisors (500828558854).

786994808666 is a wasteful number, since it uses less digits than its factorization.

786994808666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380029.

The product of its (nonzero) digits is 1504935936, while the sum is 77.

The spelling of 786994808666 in words is "seven hundred eighty-six billion, nine hundred ninety-four million, eight hundred eight thousand, six hundred sixty-six".