2601663 has 16 divisors (see below), whose sum is σ = 3709440. Its totient is φ = 1616256.

The previous prime is 2601661. The next prime is 2601671. The reversal of 2601663 is 3661062.

It is not a de Polignac number, because 2601663 - 2¹ = 2601661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2601661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6906 + ... + 7272.

It is an arithmetic number, because the mean of its divisors is an integer number (231840).

2^2601663 is an apocalyptic number.

2601663 is a deficient number, since it is larger than the sum of its proper divisors (1107777).

2601663 is a wasteful number, since it uses less digits than its factorization.

2601663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

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

The square root of 2601663 is about 1612.9671416368. The cubic root of 2601663 is about 137.5361976325.

The spelling of 2601663 in words is "two million, six hundred one thousand, six hundred sixty-three".