2661611 has 2 divisors, whose sum is σ = 2661612. Its totient is φ = 2661610.

The previous prime is 2661569. The next prime is 2661641. The reversal of 2661611 is 1161662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2661611 - 2¹⁰ = 2660587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2661641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330805 + 1330806.

It is an arithmetic number, because the mean of its divisors is an integer number (1330806).

2^2661611 is an apocalyptic number.

2661611 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661611 is an equidigital number, since it uses as much as digits as its factorization.

2661611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 2661611 is about 1631.4444520118. Note that the first 4 decimals coincide. The cubic root of 2661611 is about 138.5845643429.

The spelling of 2661611 in words is "two million, six hundred sixty-one thousand, six hundred eleven".