2666718676 has 6 divisors (see below), whose sum is σ = 4666757690. Its totient is φ = 1333359336.

The previous prime is 2666718643. The next prime is 2666718713. The reversal of 2666718676 is 6768176662.

It can be written as a sum of positive squares in only one way, i.e., 2160018576 + 506700100 = 46476^2 + 22510^2 .

It is a super-2 number, since 2×2666718676² = 14222776993854385952, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333339831 + ... + 333339838.

Almost surely, 2^2666718676 is an apocalyptic number.

It is an amenable number.

2666718676 is a deficient number, since it is larger than the sum of its proper divisors (2000039014).

2666718676 is a wasteful number, since it uses less digits than its factorization.

2666718676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666679673 (or 666679671 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 55.

The square root of 2666718676 is about 51640.2815251815. The cubic root of 2666718676 is about 1386.7315639571.

The spelling of 2666718676 in words is "two billion, six hundred sixty-six million, seven hundred eighteen thousand, six hundred seventy-six".