2766766681 has 8 divisors (see below), whose sum is σ = 3328441280. Its totient is φ = 2246697648.

The previous prime is 2766766661. The next prime is 2766766687. The reversal of 2766766681 is 1866676672.

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

It is a cyclic number.

It is not a de Polignac number, because 2766766681 - 2⁹ = 2766766169 is a prime.

It is a super-2 number, since 2×2766766681² = 15309995734183511522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2766766687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10401246 + ... + 10401511.

It is an arithmetic number, because the mean of its divisors is an integer number (416055160).

Almost surely, 2^2766766681 is an apocalyptic number.

It is an amenable number.

2766766681 is a deficient number, since it is larger than the sum of its proper divisors (561674599).

2766766681 is a wasteful number, since it uses less digits than its factorization.

2766766681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20802783.

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

The square root of 2766766681 is about 52600.0635075662. The cubic root of 2766766681 is about 1403.8612254037.

Subtracting from 2766766681 its reverse (1866676672), we obtain a palindrome (900090009).

The spelling of 2766766681 in words is "two billion, seven hundred sixty-six million, seven hundred sixty-six thousand, six hundred eighty-one".