6555993 has 8 divisors (see below), whose sum is σ = 8977728. Its totient is φ = 4252464.

The previous prime is 6555971. The next prime is 6556003. The reversal of 6555993 is 3995556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6555993 - 2⁵ = 6555961 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29421 + ... + 29642.

It is an arithmetic number, because the mean of its divisors is an integer number (1122216).

Almost surely, 2^6555993 is an apocalyptic number.

It is an amenable number.

6555993 is a deficient number, since it is larger than the sum of its proper divisors (2421735).

6555993 is a wasteful number, since it uses less digits than its factorization.

6555993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59103.

The product of its digits is 182250, while the sum is 42.

The square root of 6555993 is about 2560.4673401549. The cubic root of 6555993 is about 187.1599097344.

The spelling of 6555993 in words is "six million, five hundred fifty-five thousand, nine hundred ninety-three".