2791666 has 8 divisors (see below), whose sum is σ = 4245084. Its totient is φ = 1376640.

The previous prime is 2791661. The next prime is 2791673. The reversal of 2791666 is 6661972.

2791666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2627641 + 164025 = 1621^2 + 405^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2791661) 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 in 3 ways as a sum of consecutive naturals, for example, 9415 + ... + 9706.

2^2791666 is an apocalyptic number.

2791666 is a deficient number, since it is larger than the sum of its proper divisors (1453418).

2791666 is a wasteful number, since it uses less digits than its factorization.

2791666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19196.

The product of its digits is 27216, while the sum is 37.

The square root of 2791666 is about 1670.8279384784. The cubic root of 2791666 is about 140.8059971296.

The spelling of 2791666 in words is "two million, seven hundred ninety-one thousand, six hundred sixty-six".