2771666 has 4 divisors (see below), whose sum is σ = 4157502. Its totient is φ = 1385832.

The previous prime is 2771623. The next prime is 2771669. The reversal of 2771666 is 6661772.

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., 1729225 + 1042441 = 1315^2 + 1021^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2771669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692915 + ... + 692918.

2^2771666 is an apocalyptic number.

2771666 is a deficient number, since it is larger than the sum of its proper divisors (1385836).

2771666 is a wasteful number, since it uses less digits than its factorization.

2771666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385835.

The product of its digits is 21168, while the sum is 35.

The square root of 2771666 is about 1664.8321236689. The cubic root of 2771666 is about 140.4689377176.

The spelling of 2771666 in words is "two million, seven hundred seventy-one thousand, six hundred sixty-six".