2651866 has 16 divisors (see below), whose sum is σ = 4568256. Its totient is φ = 1130976.

The previous prime is 2651837. The next prime is 2651867. The reversal of 2651866 is 6681562.

It is not an unprimeable number, because it can be changed into a prime (2651867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3990 + ... + 4606.

It is an arithmetic number, because the mean of its divisors is an integer number (285516).

2^2651866 is an apocalyptic number.

2651866 is a deficient number, since it is larger than the sum of its proper divisors (1916390).

2651866 is a wasteful number, since it uses less digits than its factorization.

2651866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933.

The product of its digits is 17280, while the sum is 34.

The square root of 2651866 is about 1628.4550960957. The cubic root of 2651866 is about 138.4152235250.

The spelling of 2651866 in words is "two million, six hundred fifty-one thousand, eight hundred sixty-six".