6611647 has 4 divisors (see below), whose sum is σ = 7556176. Its totient is φ = 5667120.

The previous prime is 6611629. The next prime is 6611651. The reversal of 6611647 is 7461166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7461166 = 2 ⋅3730583.

It is a cyclic number.

It is not a de Polignac number, because 6611647 - 2⁷ = 6611519 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 (6611347) 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, 472254 + ... + 472267.

It is an arithmetic number, because the mean of its divisors is an integer number (1889044).

Almost surely, 2^6611647 is an apocalyptic number.

6611647 is a deficient number, since it is larger than the sum of its proper divisors (944529).

6611647 is an equidigital number, since it uses as much as digits as its factorization.

6611647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944528.

The product of its digits is 6048, while the sum is 31.

The square root of 6611647 is about 2571.3123108639. The cubic root of 6611647 is about 187.6880199882.

The spelling of 6611647 in words is "six million, six hundred eleven thousand, six hundred forty-seven".