6617623 has 4 divisors (see below), whose sum is σ = 6622840. Its totient is φ = 6612408.

The previous prime is 6617603. The next prime is 6617627. The reversal of 6617623 is 3267166.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6617623 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 (6617627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661 + ... + 3697.

It is an arithmetic number, because the mean of its divisors is an integer number (1655710).

Almost surely, 2^6617623 is an apocalyptic number.

6617623 is a deficient number, since it is larger than the sum of its proper divisors (5217).

6617623 is a wasteful number, since it uses less digits than its factorization.

6617623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5216.

The product of its digits is 9072, while the sum is 31.

The square root of 6617623 is about 2572.4741009386. The cubic root of 6617623 is about 187.7445508267.

It can be divided in two parts, 66 and 17623, that added together give a square (17689 = 133²).

The spelling of 6617623 in words is "six million, six hundred seventeen thousand, six hundred twenty-three".