2665994 has 4 divisors (see below), whose sum is σ = 3998994. Its totient is φ = 1332996.

The previous prime is 2665973. The next prime is 2666021. The reversal of 2665994 is 4995662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2140369 + 525625 = 1463^2 + 725^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666497 + ... + 666500.

2^2665994 is an apocalyptic number.

2665994 is a deficient number, since it is larger than the sum of its proper divisors (1333000).

2665994 is a wasteful number, since it uses less digits than its factorization.

2665994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332999.

The product of its digits is 116640, while the sum is 41.

The square root of 2665994 is about 1632.7871876028. The cubic root of 2665994 is about 138.6605938641.

The spelling of 2665994 in words is "two million, six hundred sixty-five thousand, nine hundred ninety-four".