2872666 has 4 divisors (see below), whose sum is σ = 4309002. Its totient is φ = 1436332.

The previous prime is 2872621. The next prime is 2872669. The reversal of 2872666 is 6662782.

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., 2627641 + 245025 = 1621^2 + 495^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (2872669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718165 + ... + 718168.

2^2872666 is an apocalyptic number.

2872666 is a deficient number, since it is larger than the sum of its proper divisors (1436336).

2872666 is a wasteful number, since it uses less digits than its factorization.

2872666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436335.

The product of its digits is 48384, while the sum is 37.

The square root of 2872666 is about 1694.8940969866. The cubic root of 2872666 is about 142.1548598185.

Subtracting from 2872666 its product of digits (48384), we obtain a palindrome (2824282).

The spelling of 2872666 in words is "two million, eight hundred seventy-two thousand, six hundred sixty-six".