6613623 has 16 divisors (see below), whose sum is σ = 9838560. Its totient is φ = 4390848.

The previous prime is 6613619. The next prime is 6613631. The reversal of 6613623 is 3263166.

It is not a de Polignac number, because 6613623 - 2² = 6613619 is a prime.

It is a super-2 number, since 2×6613623² = 87480018372258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6613603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10411 + ... + 11027.

It is an arithmetic number, because the mean of its divisors is an integer number (614910).

Almost surely, 2^6613623 is an apocalyptic number.

6613623 is a deficient number, since it is larger than the sum of its proper divisors (3224937).

6613623 is a wasteful number, since it uses less digits than its factorization.

6613623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1017 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 6613623 is about 2571.6965217537. The cubic root of 6613623 is about 187.7067160149.

Adding to 6613623 its reverse (3263166), we get a palindrome (9876789).

It can be divided in two parts, 66 and 13623, that added together give a square (13689 = 117²).

The spelling of 6613623 in words is "six million, six hundred thirteen thousand, six hundred twenty-three".