6659387 has 4 divisors (see below), whose sum is σ = 7610736. Its totient is φ = 5708040.

The previous prime is 6659377. The next prime is 6659399. The reversal of 6659387 is 7839566.

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-6659387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6659377) 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, 475664 + ... + 475677.

It is an arithmetic number, because the mean of its divisors is an integer number (1902684).

Almost surely, 2^6659387 is an apocalyptic number.

6659387 is a deficient number, since it is larger than the sum of its proper divisors (951349).

6659387 is an equidigital number, since it uses as much as digits as its factorization.

6659387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951348.

The product of its digits is 272160, while the sum is 44.

The square root of 6659387 is about 2580.5788110422. The cubic root of 6659387 is about 188.1386765405.

The spelling of 6659387 in words is "six million, six hundred fifty-nine thousand, three hundred eighty-seven".