2646605 has 16 divisors (see below), whose sum is σ = 3601920. Its totient is φ = 1850688.

The previous prime is 2646599. The next prime is 2646613. The reversal of 2646605 is 5066462.

It is a cyclic number.

It is not a de Polignac number, because 2646605 - 2¹⁰ = 2645581 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164 + ... + 2306.

It is an arithmetic number, because the mean of its divisors is an integer number (225120).

2^2646605 is an apocalyptic number.

It is an amenable number.

2646605 is a deficient number, since it is larger than the sum of its proper divisors (955315).

2646605 is a wasteful number, since it uses less digits than its factorization.

2646605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2646605 is about 1626.8389594548. The cubic root of 2646605 is about 138.3236295833.

The spelling of 2646605 in words is "two million, six hundred forty-six thousand, six hundred five".