6610661 has 8 divisors (see below), whose sum is σ = 6760344. Its totient is φ = 6462720.

The previous prime is 6610621. The next prime is 6610673. The reversal of 6610661 is 1660166.

6610661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2280100 + 4330561 = 1510^2 + 2081^2 .

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-6610661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6610661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6610601) 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, 9671 + ... + 10331.

It is an arithmetic number, because the mean of its divisors is an integer number (845043).

Almost surely, 2^6610661 is an apocalyptic number.

It is an amenable number.

6610661 is a deficient number, since it is larger than the sum of its proper divisors (149683).

6610661 is a wasteful number, since it uses less digits than its factorization.

6610661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 6610661 is about 2571.1205728242. The cubic root of 6610661 is about 187.6786895047.

The spelling of 6610661 in words is "six million, six hundred ten thousand, six hundred sixty-one".