2666655 has 16 divisors (see below), whose sum is σ = 4740960. Its totient is φ = 1422144.

The previous prime is 2666647. The next prime is 2666659. The reversal of 2666655 is 5566662.

2666655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2666655 - 2³ = 2666647 is a prime.

It is a super-2 number, since 2×2666655² = 14222097778050, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666659) 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 15 ways as a sum of consecutive naturals, for example, 9742 + ... + 10011.

It is an arithmetic number, because the mean of its divisors is an integer number (296310).

2^2666655 is an apocalyptic number.

2666655 is a deficient number, since it is larger than the sum of its proper divisors (2074305).

2666655 is a wasteful number, since it uses less digits than its factorization.

2666655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19767 (or 19761 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 2666655 is about 1632.9895896790. The cubic root of 2666655 is about 138.6720526395.

It can be divided in two parts, 2666 and 655, that added together give a triangular number (3321 = T₈₁).

The spelling of 2666655 in words is "two million, six hundred sixty-six thousand, six hundred fifty-five".