2666457 has 6 divisors (see below), whose sum is σ = 3851562. Its totient is φ = 1777632.

The previous prime is 2666453. The next prime is 2666491. The reversal of 2666457 is 7546662.

It can be written as a sum of positive squares in only one way, i.e., 2277081 + 389376 = 1509^2 + 624^2 .

It is not a de Polignac number, because 2666457 - 2² = 2666453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2666453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 148128 + ... + 148145.

It is an arithmetic number, because the mean of its divisors is an integer number (641927).

2^2666457 is an apocalyptic number.

It is an amenable number.

2666457 is a deficient number, since it is larger than the sum of its proper divisors (1185105).

2666457 is a wasteful number, since it uses less digits than its factorization.

2666457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296279 (or 296276 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 2666457 is about 1632.9289635499. The cubic root of 2666457 is about 138.6686204062.

The spelling of 2666457 in words is "two million, six hundred sixty-six thousand, four hundred fifty-seven".