2668405 has 8 divisors (see below), whose sum is σ = 3390552. Its totient is φ = 2009088.

The previous prime is 2668399. The next prime is 2668411. The reversal of 2668405 is 5048662.

It is an interprime number because it is at equal distance from previous prime (2668399) and next prime (2668411).

It can be written as a sum of positive squares in 4 ways, for example, as 1418481 + 1249924 = 1191^2 + 1118^2 .

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 2668405 - 2⁷ = 2668277 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 6⁷ + 6⁷ + 8⁷ + 4³ + 0 + 5⁵ .

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15612 + ... + 15781.

It is an arithmetic number, because the mean of its divisors is an integer number (423819).

2^2668405 is an apocalyptic number.

It is an amenable number.

2668405 is a deficient number, since it is larger than the sum of its proper divisors (722147).

2668405 is a wasteful number, since it uses less digits than its factorization.

2668405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31415.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2668405 is about 1633.5253288517. The cubic root of 2668405 is about 138.7023806504.

The spelling of 2668405 in words is "two million, six hundred sixty-eight thousand, four hundred five".