2666257 has 8 divisors (see below), whose sum is σ = 2987712. Its totient is φ = 2358000.

The previous prime is 2666227. The next prime is 2666267. The reversal of 2666257 is 7526662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2666257 - 2¹⁵ = 2633489 is a prime.

It is a Duffinian number.

2666257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2666227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2869 + ... + 3682.

It is an arithmetic number, because the mean of its divisors is an integer number (373464).

2^2666257 is an apocalyptic number.

It is an amenable number.

2666257 is a deficient number, since it is larger than the sum of its proper divisors (321455).

2666257 is a wasteful number, since it uses less digits than its factorization.

2666257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6599.

The product of its digits is 30240, while the sum is 34.

The square root of 2666257 is about 1632.8677227504. The cubic root of 2666257 is about 138.6651533314.

The spelling of 2666257 in words is "two million, six hundred sixty-six thousand, two hundred fifty-seven".