2666431 has 4 divisors (see below), whose sum is σ = 2686032. Its totient is φ = 2646832.

The previous prime is 2666429. The next prime is 2666453. The reversal of 2666431 is 1346662.

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

It is a cyclic number.

It is not a de Polignac number, because 2666431 - 2¹ = 2666429 is a prime.

It is a super-2 number, since 2×2666431² = 14219708555522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2666431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9595 + ... + 9868.

It is an arithmetic number, because the mean of its divisors is an integer number (671508).

2^2666431 is an apocalyptic number.

2666431 is a deficient number, since it is larger than the sum of its proper divisors (19601).

2666431 is a wasteful number, since it uses less digits than its factorization.

2666431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19600.

The product of its digits is 5184, while the sum is 28.

The square root of 2666431 is about 1632.9210023758. The cubic root of 2666431 is about 138.6681696963.

The spelling of 2666431 in words is "two million, six hundred sixty-six thousand, four hundred thirty-one".