2905666 has 4 divisors (see below), whose sum is σ = 4358502. Its totient is φ = 1452832.

The previous prime is 2905631. The next prime is 2905667. The reversal of 2905666 is 6665092.

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., 1863225 + 1042441 = 1365^2 + 1021^2 .

It is not an unprimeable number, because it can be changed into a prime (2905667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 726415 + ... + 726418.

2^2905666 is an apocalyptic number.

2905666 is a deficient number, since it is larger than the sum of its proper divisors (1452836).

2905666 is a wasteful number, since it uses less digits than its factorization.

2905666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452835.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 2905666 is about 1704.6014196873. The cubic root of 2905666 is about 142.6971274037.

The spelling of 2905666 in words is "two million, nine hundred five thousand, six hundred sixty-six".