6662774772666 has 24 divisors (see below), whose sum is σ = 14436587509344. Its totient is φ = 2220836385480.

The previous prime is 6662774772659. The next prime is 6662774772677.

6662774772666 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×6662774772666³ (a number of 39 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6662774772594 and 6662774772603.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6913380 + ... + 7817951.

It is an arithmetic number, because the mean of its divisors is an integer number (601524479556).

Almost surely, 2^{6662774772666} is an apocalyptic number.

6662774772666 is an abundant number, since it is smaller than the sum of its proper divisors (7773812736678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6662774772666 is a wasteful number, since it uses less digits than its factorization.

6662774772666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14756466 (or 14756463 counting only the distinct ones).

The product of its digits is 1792336896, while the sum is 72.

The spelling of 6662774772666 in words is "six trillion, six hundred sixty-two billion, seven hundred seventy-four million, seven hundred seventy-two thousand, six hundred sixty-six".