2666761 has 4 divisors (see below), whose sum is σ = 2691792. Its totient is φ = 2641732.

The previous prime is 2666749. The next prime is 2666779. The reversal of 2666761 is 1676662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2666761 - 2⁷ = 2666633 is a prime.

It is a super-2 number, since 2×2666761² = 14223228462242, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2666791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12355 + ... + 12568.

It is an arithmetic number, because the mean of its divisors is an integer number (672948).

2^2666761 is an apocalyptic number.

It is an amenable number.

2666761 is a deficient number, since it is larger than the sum of its proper divisors (25031).

2666761 is a wasteful number, since it uses less digits than its factorization.

2666761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25030.

The product of its digits is 18144, while the sum is 34.

The square root of 2666761 is about 1633.0220451666. The cubic root of 2666761 is about 138.6738900279.

Subtracting from 2666761 its reverse (1676662), we obtain a palindrome (990099).

The spelling of 2666761 in words is "two million, six hundred sixty-six thousand, seven hundred sixty-one".