2666961 has 36 divisors (see below), whose sum is σ = 4426240. Its totient is φ = 1544400.

The previous prime is 2666953. The next prime is 2666969. The reversal of 2666961 is 1696662.

2666961 = T₁₀ + T₁₁ + ... + T₂₅₁.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2666953) and next prime (2666969).

It is not a de Polignac number, because 2666961 - 2³ = 2666953 is a prime.

It is a super-2 number, since 2×2666961² = 14225361951042, which contains 22 as substring.

It is a Duffinian number.

2666961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2666969) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 33720 + ... + 33798.

2^2666961 is an apocalyptic number.

It is an amenable number.

2666961 is a deficient number, since it is larger than the sum of its proper divisors (1759279).

2666961 is a wasteful number, since it uses less digits than its factorization.

2666961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 124 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 2666961 is about 1633.0832801789. The cubic root of 2666961 is about 138.6773566658.

Subtracting from 2666961 its reverse (1696662), we obtain a cube (970299 = 99³).

It can be divided in two parts, 266 and 6961, that added together give a palindrome (7227).

The spelling of 2666961 in words is "two million, six hundred sixty-six thousand, nine hundred sixty-one".