2664457 has 4 divisors (see below), whose sum is σ = 2667796. Its totient is φ = 2661120.

The previous prime is 2664451. The next prime is 2664479. The reversal of 2664457 is 7544662.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7544662 = 2 ⋅3772331.

It can be written as a sum of positive squares in 2 ways, for example, as 2368521 + 295936 = 1539^2 + 544^2 .

It is a cyclic number.

It is not a de Polignac number, because 2664457 - 2³ = 2664449 is a prime.

It is a super-2 number, since 2×2664457² = 14198662209698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2664451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313 + ... + 2329.

It is an arithmetic number, because the mean of its divisors is an integer number (666949).

2^2664457 is an apocalyptic number.

It is an amenable number.

2664457 is a deficient number, since it is larger than the sum of its proper divisors (3339).

2664457 is a wasteful number, since it uses less digits than its factorization.

2664457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338.

The product of its digits is 40320, while the sum is 34.

The square root of 2664457 is about 1632.3164521624. The cubic root of 2664457 is about 138.6339418534.

The spelling of 2664457 in words is "two million, six hundred sixty-four thousand, four hundred fifty-seven".