6658993 has 8 divisors (see below), whose sum is σ = 7325856. Its totient is φ = 6052420.

The previous prime is 6658969. The next prime is 6658997. The reversal of 6658993 is 3998566.

It is not a de Polignac number, because 6658993 - 2⁵ = 6658961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6658997) 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 7 ways as a sum of consecutive naturals, for example, 1171 + ... + 3832.

It is an arithmetic number, because the mean of its divisors is an integer number (915732).

Almost surely, 2^6658993 is an apocalyptic number.

It is an amenable number.

6658993 is a deficient number, since it is larger than the sum of its proper divisors (666863).

6658993 is an equidigital number, since it uses as much as digits as its factorization.

6658993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5036 (or 5014 counting only the distinct ones).

The product of its digits is 349920, while the sum is 46.

The square root of 6658993 is about 2580.5024704503. The cubic root of 6658993 is about 188.1349660839.

The spelling of 6658993 in words is "six million, six hundred fifty-eight thousand, nine hundred ninety-three".