2666437 has 4 divisors (see below), whose sum is σ = 2685760. Its totient is φ = 2647116.

The previous prime is 2666429. The next prime is 2666453. The reversal of 2666437 is 7346662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2666437 - 2³ = 2666429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666537) 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, 9453 + ... + 9730.

It is an arithmetic number, because the mean of its divisors is an integer number (671440).

It is a 138-hyperperfect number.

2^2666437 is an apocalyptic number.

It is an amenable number.

2666437 is a deficient number, since it is larger than the sum of its proper divisors (19323).

2666437 is a wasteful number, since it uses less digits than its factorization.

2666437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19322.

The product of its digits is 36288, while the sum is 34.

The square root of 2666437 is about 1632.9228395733. The cubic root of 2666437 is about 138.6682737065.

The spelling of 2666437 in words is "two million, six hundred sixty-six thousand, four hundred thirty-seven".