6658791 has 8 divisors (see below), whose sum is σ = 8932224. Its totient is φ = 4412280.

The previous prime is 6658789. The next prime is 6658793. The reversal of 6658791 is 1978566.

6658791 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6658789) and next prime (6658793).

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

It is not a de Polignac number, because 6658791 - 2¹ = 6658789 is a prime.

6658791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6658793) 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, 6145 + ... + 7146.

It is an arithmetic number, because the mean of its divisors is an integer number (1116528).

Almost surely, 2^6658791 is an apocalyptic number.

6658791 is a deficient number, since it is larger than the sum of its proper divisors (2273433).

6658791 is a wasteful number, since it uses less digits than its factorization.

6658791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13461.

The product of its digits is 90720, while the sum is 42.

The square root of 6658791 is about 2580.4633304893. The cubic root of 6658791 is about 188.1330637118.

The spelling of 6658791 in words is "six million, six hundred fifty-eight thousand, seven hundred ninety-one".