2766681 has 6 divisors (see below), whose sum is σ = 3996330. Its totient is φ = 1844448.

The previous prime is 2766679. The next prime is 2766691. The reversal of 2766681 is 1866672.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2752281 + 14400 = 1659^2 + 120^2 .

It is not a de Polignac number, because 2766681 - 2¹ = 2766679 is a prime.

It is a super-2 number, since 2×2766681² = 15309047511522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2766611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153696 + ... + 153713.

It is an arithmetic number, because the mean of its divisors is an integer number (666055).

2^2766681 is an apocalyptic number.

It is an amenable number.

2766681 is a deficient number, since it is larger than the sum of its proper divisors (1229649).

2766681 is a wasteful number, since it uses less digits than its factorization.

2766681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307415 (or 307412 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 2766681 is about 1663.3343019369. The cubic root of 2766681 is about 140.3846733702.

Subtracting from 2766681 its reverse (1866672), we obtain a palindrome (900009).

The spelling of 2766681 in words is "two million, seven hundred sixty-six thousand, six hundred eighty-one".