2725666 has 4 divisors (see below), whose sum is σ = 4088502. Its totient is φ = 1362832.

The previous prime is 2725649. The next prime is 2725669. The reversal of 2725666 is 6665272.

It is a happy number.

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., 2673225 + 52441 = 1635^2 + 229^2 .

It is not an unprimeable number, because it can be changed into a prime (2725669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 681415 + ... + 681418.

2^2725666 is an apocalyptic number.

2725666 is a deficient number, since it is larger than the sum of its proper divisors (1362836).

2725666 is a wasteful number, since it uses less digits than its factorization.

2725666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362835.

The product of its digits is 30240, while the sum is 34.

The square root of 2725666 is about 1650.9591151812. The cubic root of 2725666 is about 139.6875002544.

The spelling of 2725666 in words is "two million, seven hundred twenty-five thousand, six hundred sixty-six".