6626387 has 4 divisors (see below), whose sum is σ = 6631560. Its totient is φ = 6621216.

The previous prime is 6626381. The next prime is 6626407. The reversal of 6626387 is 7836266.

6626387 is nontrivially palindromic in base 2.

6626387 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6626387 - 2¹⁰ = 6625363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6626387.

It is not an unprimeable number, because it can be changed into a prime (6626381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923 + ... + 3755.

It is an arithmetic number, because the mean of its divisors is an integer number (1657890).

Almost surely, 2^6626387 is an apocalyptic number.

6626387 is a deficient number, since it is larger than the sum of its proper divisors (5173).

6626387 is a wasteful number, since it uses less digits than its factorization.

6626387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5172.

The product of its digits is 72576, while the sum is 38.

The square root of 6626387 is about 2574.1769558443. The cubic root of 6626387 is about 187.8273936351.

The spelling of 6626387 in words is "six million, six hundred twenty-six thousand, three hundred eighty-seven".