2668257 has 6 divisors (see below), whose sum is σ = 3854162. Its totient is φ = 1778832.

The previous prime is 2668249. The next prime is 2668271. The reversal of 2668257 is 7528662.

2668257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2509056 + 159201 = 1584^2 + 399^2 .

It is not a de Polignac number, because 2668257 - 2³ = 2668249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2668217) 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 5 ways as a sum of consecutive naturals, for example, 148228 + ... + 148245.

2^2668257 is an apocalyptic number.

It is an amenable number.

2668257 is a deficient number, since it is larger than the sum of its proper divisors (1185905).

2668257 is a wasteful number, since it uses less digits than its factorization.

2668257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296479 (or 296476 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 2668257 is about 1633.4800274261. The cubic root of 2668257 is about 138.6998162805.

The spelling of 2668257 in words is "two million, six hundred sixty-eight thousand, two hundred fifty-seven".