2647661 has 8 divisors (see below), whose sum is σ = 2721600. Its totient is φ = 2574880.

The previous prime is 2647649. The next prime is 2647681. The reversal of 2647661 is 1667462.

2647661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2647661 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 (2647681) 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 7 ways as a sum of consecutive naturals, for example, 6110 + ... + 6528.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

2^2647661 is an apocalyptic number.

It is an amenable number.

2647661 is a deficient number, since it is larger than the sum of its proper divisors (73939).

2647661 is an equidigital number, since it uses as much as digits as its factorization.

2647661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579.

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

The square root of 2647661 is about 1627.1634828744. The cubic root of 2647661 is about 138.3420242600.

The spelling of 2647661 in words is "two million, six hundred forty-seven thousand, six hundred sixty-one".