2668906 has 4 divisors (see below), whose sum is σ = 4003362. Its totient is φ = 1334452.

The previous prime is 2668903. The next prime is 2668907. The reversal of 2668906 is 6098662.

2668906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6098662 = 2 ⋅3049331.

It can be written as a sum of positive squares in only one way, i.e., 2128681 + 540225 = 1459^2 + 735^2 .

It is not an unprimeable number, because it can be changed into a prime (2668903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667225 + ... + 667228.

2^2668906 is an apocalyptic number.

2668906 is a deficient number, since it is larger than the sum of its proper divisors (1334456).

2668906 is a wasteful number, since it uses less digits than its factorization.

2668906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334455.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 2668906 is about 1633.6786709754. The cubic root of 2668906 is about 138.7110606851.

The spelling of 2668906 in words is "two million, six hundred sixty-eight thousand, nine hundred six".