2664491 has 8 divisors (see below), whose sum is σ = 2780400. Its totient is φ = 2550240.

The previous prime is 2664479. The next prime is 2664511. The reversal of 2664491 is 1944662.

2664491 = 289² + 290² + ... + 317².

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 2664491 - 2¹⁰ = 2663467 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 (2664401) 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, 3701 + ... + 4361.

It is an arithmetic number, because the mean of its divisors is an integer number (347550).

2^2664491 is an apocalyptic number.

2664491 is a deficient number, since it is larger than the sum of its proper divisors (115909).

2664491 is a wasteful number, since it uses less digits than its factorization.

2664491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its digits is 10368, while the sum is 32.

The square root of 2664491 is about 1632.3268667764. The cubic root of 2664491 is about 138.6345315338.

The spelling of 2664491 in words is "two million, six hundred sixty-four thousand, four hundred ninety-one".