2156766 has 16 divisors (see below), whose sum is σ = 4540800. Its totient is φ = 681048.

The previous prime is 2156761. The next prime is 2156789. The reversal of 2156766 is 6676512.

2156766 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9346 + ... + 9573.

It is an arithmetic number, because the mean of its divisors is an integer number (283800).

2^2156766 is an apocalyptic number.

2156766 is an abundant number, since it is smaller than the sum of its proper divisors (2384034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2156766 is a wasteful number, since it uses less digits than its factorization.

2156766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18943.

The product of its digits is 15120, while the sum is 33.

The square root of 2156766 is about 1468.5932043966. The cubic root of 2156766 is about 129.2015358283.

The spelling of 2156766 in words is "two million, one hundred fifty-six thousand, seven hundred sixty-six".