2897666 has 4 divisors (see below), whose sum is σ = 4346502. Its totient is φ = 1448832.

The previous prime is 2897627. The next prime is 2897689. The reversal of 2897666 is 6667982.

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., 2042041 + 855625 = 1429^2 + 925^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 724415 + ... + 724418.

2^2897666 is an apocalyptic number.

2897666 is a deficient number, since it is larger than the sum of its proper divisors (1448836).

2897666 is a wasteful number, since it uses less digits than its factorization.

2897666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448835.

The product of its digits is 217728, while the sum is 44.

The square root of 2897666 is about 1702.2532126567. The cubic root of 2897666 is about 142.5660471507.

The spelling of 2897666 in words is "two million, eight hundred ninety-seven thousand, six hundred sixty-six".