2663405 has 8 divisors (see below), whose sum is σ = 3240312. Its totient is φ = 2101248.

The previous prime is 2663393. The next prime is 2663429. The reversal of 2663405 is 5043662.

It can be written as a sum of positive squares in 4 ways, for example, as 195364 + 2468041 = 442^2 + 1571^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2663405 - 2¹⁰ = 2662381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3284 + ... + 4013.

It is an arithmetic number, because the mean of its divisors is an integer number (405039).

2^2663405 is an apocalyptic number.

It is an amenable number.

2663405 is a deficient number, since it is larger than the sum of its proper divisors (576907).

2663405 is an equidigital number, since it uses as much as digits as its factorization.

2663405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7375.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2663405 is about 1631.9941789112. The cubic root of 2663405 is about 138.6156939696.

The spelling of 2663405 in words is "two million, six hundred sixty-three thousand, four hundred five".