6610663 has 4 divisors (see below), whose sum is σ = 6647368. Its totient is φ = 6573960.

The previous prime is 6610621. The next prime is 6610673. The reversal of 6610663 is 3660166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3660166 = 2 ⋅1830083.

It is a cyclic number.

It is not a de Polignac number, because 6610663 - 2⁹ = 6610151 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 (6610673) 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, 18081 + ... + 18442.

It is an arithmetic number, because the mean of its divisors is an integer number (1661842).

Almost surely, 2^6610663 is an apocalyptic number.

6610663 is a deficient number, since it is larger than the sum of its proper divisors (36705).

6610663 is a wasteful number, since it uses less digits than its factorization.

6610663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36704.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 6610663 is about 2571.1209617597. The cubic root of 6610663 is about 187.6787084316.

The spelling of 6610663 in words is "six million, six hundred ten thousand, six hundred sixty-three".