2664671 has 4 divisors (see below), whose sum is σ = 2685144. Its totient is φ = 2644200.

The previous prime is 2664661. The next prime is 2664689. The reversal of 2664671 is 1764662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2664671 - 2¹⁴ = 2648287 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 (2664601) 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, 10040 + ... + 10301.

It is an arithmetic number, because the mean of its divisors is an integer number (671286).

2^2664671 is an apocalyptic number.

2664671 is a deficient number, since it is larger than the sum of its proper divisors (20473).

2664671 is a wasteful number, since it uses less digits than its factorization.

2664671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20472.

The product of its digits is 12096, while the sum is 32.

The square root of 2664671 is about 1632.3820018611. The cubic root of 2664671 is about 138.6376532875.

Subtracting from 2664671 its reverse (1764662), we obtain a palindrome (900009).

The spelling of 2664671 in words is "two million, six hundred sixty-four thousand, six hundred seventy-one".