7666718314686 has 8 divisors (see below), whose sum is σ = 15333436629384. Its totient is φ = 2555572771560.

The previous prime is 7666718314667. The next prime is 7666718314727. The reversal of 7666718314686 is 6864138176667.

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

7666718314686 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 7666718314686.

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, 638893192885 + ... + 638893192896.

It is an arithmetic number, because the mean of its divisors is an integer number (1916679578673).

Almost surely, 2^{7666718314686} is an apocalyptic number.

7666718314686 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.

7666718314686 is a wasteful number, since it uses less digits than its factorization.

7666718314686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277786385786.

The product of its digits is 292626432, while the sum is 69.

The spelling of 7666718314686 in words is "seven trillion, six hundred sixty-six billion, seven hundred eighteen million, three hundred fourteen thousand, six hundred eighty-six".