6623618 has 4 divisors (see below), whose sum is σ = 9935430. Its totient is φ = 3311808.

The previous prime is 6623611. The next prime is 6623707. The reversal of 6623618 is 8163266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6165289 + 458329 = 2483^2 + 677^2 .

It is not an unprimeable number, because it can be changed into a prime (6623611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1655903 + ... + 1655906.

Almost surely, 2^6623618 is an apocalyptic number.

6623618 is a deficient number, since it is larger than the sum of its proper divisors (3311812).

6623618 is a wasteful number, since it uses less digits than its factorization.

6623618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3311811.

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

The square root of 6623618 is about 2573.6390578323. The cubic root of 6623618 is about 187.8012272131.

The spelling of 6623618 in words is "six million, six hundred twenty-three thousand, six hundred eighteen".