2661603 has 8 divisors (see below), whose sum is σ = 4055808. Its totient is φ = 1520904.

The previous prime is 2661569. The next prime is 2661611. The reversal of 2661603 is 3061662.

2661603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2661603 - 2¹⁰ = 2660579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2661643) 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 7 ways as a sum of consecutive naturals, for example, 63351 + ... + 63392.

It is an arithmetic number, because the mean of its divisors is an integer number (506976).

2^2661603 is an apocalyptic number.

2661603 is a deficient number, since it is larger than the sum of its proper divisors (1394205).

2661603 is a wasteful number, since it uses less digits than its factorization.

2661603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126753.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 2661603 is about 1631.4420001949. The cubic root of 2661603 is about 138.5844254950.

The spelling of 2661603 in words is "two million, six hundred sixty-one thousand, six hundred three".