2664805 has 16 divisors (see below), whose sum is σ = 3757824. Its totient is φ = 1788480.

The previous prime is 2664793. The next prime is 2664811. The reversal of 2664805 is 5084662.

2664805 = T₃₅₀ + T₃₅₁ + ... + T₃₈₈.

It is not a de Polignac number, because 2664805 - 2⁹ = 2664293 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 15 ways as a sum of consecutive naturals, for example, 1149 + ... + 2578.

It is an arithmetic number, because the mean of its divisors is an integer number (234864).

2^2664805 is an apocalyptic number.

It is an amenable number.

2664805 is a deficient number, since it is larger than the sum of its proper divisors (1093019).

2664805 is a wasteful number, since it uses less digits than its factorization.

2664805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3756.

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

The square root of 2664805 is about 1632.4230456594. The cubic root of 2664805 is about 138.6399771684.

The spelling of 2664805 in words is "two million, six hundred sixty-four thousand, eight hundred five".