63946666766 has 16 divisors (see below), whose sum is σ = 98453145600. Its totient is φ = 31135789080.

The previous prime is 63946666673. The next prime is 63946666807. The reversal of 63946666766 is 66766664936.

63946666766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1690550 + ... + 1727961.

It is an arithmetic number, because the mean of its divisors is an integer number (6153321600).

Almost surely, 2^63946666766 is an apocalyptic number.

63946666766 is a deficient number, since it is larger than the sum of its proper divisors (34506478834).

63946666766 is a wasteful number, since it uses less digits than its factorization.

63946666766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418759.

The product of its digits is 211631616, while the sum is 65.

The spelling of 63946666766 in words is "sixty-three billion, nine hundred forty-six million, six hundred sixty-six thousand, seven hundred sixty-six".