2661345 has 12 divisors (see below), whose sum is σ = 4613076. Its totient is φ = 1419360.

The previous prime is 2661341. The next prime is 2661371. The reversal of 2661345 is 5431662.

2661345 is a `hidden beast` number, since 2 + 6 + 613 + 45 = 666.

2661345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1306449 + 1354896 = 1143^2 + 1164^2 .

It is not a de Polignac number, because 2661345 - 2² = 2661341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29526 + ... + 29615.

It is an arithmetic number, because the mean of its divisors is an integer number (384423).

2^2661345 is an apocalyptic number.

It is an amenable number.

2661345 is a deficient number, since it is larger than the sum of its proper divisors (1951731).

2661345 is a wasteful number, since it uses less digits than its factorization.

2661345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59152 (or 59149 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 2661345 is about 1631.3629271257. The cubic root of 2661345 is about 138.5799474997.

The spelling of 2661345 in words is "two million, six hundred sixty-one thousand, three hundred forty-five".