6551623 has 6 divisors (see below), whose sum is σ = 7094544. Its totient is φ = 6047496.

The previous prime is 6551603. The next prime is 6551639. The reversal of 6551623 is 3261556.

6551623 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6551623 - 2⁵ = 6551591 is a prime.

It is a Duffinian number.

6551623 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6551591 and 6551600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551603) 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 5 ways as a sum of consecutive naturals, for example, 19215 + ... + 19552.

It is an arithmetic number, because the mean of its divisors is an integer number (1182424).

Almost surely, 2^6551623 is an apocalyptic number.

6551623 is a deficient number, since it is larger than the sum of its proper divisors (542921).

6551623 is a wasteful number, since it uses less digits than its factorization.

6551623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38793 (or 38780 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 6551623 is about 2559.6138380623. The cubic root of 6551623 is about 187.1183156999.

It can be divided in two parts, 655 and 1623, that added together give a triangular number (2278 = T₆₇).

The spelling of 6551623 in words is "six million, five hundred fifty-one thousand, six hundred twenty-three".