6626987 has 4 divisors (see below), whose sum is σ = 6679296. Its totient is φ = 6574680.

The previous prime is 6626981. The next prime is 6626989. The reversal of 6626987 is 7896266.

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-6626987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6626981) 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 3 ways as a sum of consecutive naturals, for example, 25964 + ... + 26217.

It is an arithmetic number, because the mean of its divisors is an integer number (1669824).

Almost surely, 2^6626987 is an apocalyptic number.

6626987 is a deficient number, since it is larger than the sum of its proper divisors (52309).

6626987 is a wasteful number, since it uses less digits than its factorization.

6626987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52308.

The product of its digits is 217728, while the sum is 44.

The square root of 6626987 is about 2574.2934953109. The cubic root of 6626987 is about 187.8330625381.

The spelling of 6626987 in words is "six million, six hundred twenty-six thousand, nine hundred eighty-seven".