2666631 has 16 divisors (see below), whose sum is σ = 4083840. Its totient is φ = 1530720.

The previous prime is 2666591. The next prime is 2666633. The reversal of 2666631 is 1366662.

It is not a de Polignac number, because 2666631 - 2¹⁴ = 2650247 is a prime.

It is a super-2 number, since 2×2666631² = 14221841780322, 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 (2666633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1500 + ... + 2753.

It is an arithmetic number, because the mean of its divisors is an integer number (255240).

2^2666631 is an apocalyptic number.

2666631 is a deficient number, since it is larger than the sum of its proper divisors (1417209).

2666631 is a wasteful number, since it uses less digits than its factorization.

2666631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4286.

The product of its digits is 7776, while the sum is 30.

The square root of 2666631 is about 1632.9822411772. The cubic root of 2666631 is about 138.6716366202.

The spelling of 2666631 in words is "two million, six hundred sixty-six thousand, six hundred thirty-one".