2772166 has 4 divisors (see below), whose sum is σ = 4158252. Its totient is φ = 1386082.

The previous prime is 2772137. The next prime is 2772179. The reversal of 2772166 is 6612772.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693040 + ... + 693043.

It is an arithmetic number, because the mean of its divisors is an integer number (1039563).

2^2772166 is an apocalyptic number.

2772166 is a deficient number, since it is larger than the sum of its proper divisors (1386086).

2772166 is a wasteful number, since it uses less digits than its factorization.

2772166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386085.

The product of its digits is 7056, while the sum is 31.

The square root of 2772166 is about 1664.9822821880. The cubic root of 2772166 is about 140.4773839308.

Subtracting 2772166 from its reverse (6612772), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 2772166 in words is "two million, seven hundred seventy-two thousand, one hundred sixty-six".