6607391 has 4 divisors (see below), whose sum is σ = 7551312. Its totient is φ = 5663472.

The previous prime is 6607379. The next prime is 6607409. The reversal of 6607391 is 1937066.

6607391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6607391 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6607301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471950 + ... + 471963.

It is an arithmetic number, because the mean of its divisors is an integer number (1887828).

Almost surely, 2^6607391 is an apocalyptic number.

6607391 is a deficient number, since it is larger than the sum of its proper divisors (943921).

6607391 is an equidigital number, since it uses as much as digits as its factorization.

6607391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943920.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 6607391 is about 2570.4845846649. The cubic root of 6607391 is about 187.6477389672.

The spelling of 6607391 in words is "six million, six hundred seven thousand, three hundred ninety-one".