6626869987 has 4 divisors (see below), whose sum is σ = 6720206256. Its totient is φ = 6533533720.

The previous prime is 6626869979. The next prime is 6626870017. The reversal of 6626869987 is 7899686266.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6626869987 - 2³ = 6626869979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6626869937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46668028 + ... + 46668169.

It is an arithmetic number, because the mean of its divisors is an integer number (1680051564).

Almost surely, 2^6626869987 is an apocalyptic number.

6626869987 is a deficient number, since it is larger than the sum of its proper divisors (93336269).

6626869987 is an equidigital number, since it uses as much as digits as its factorization.

6626869987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93336268.

The product of its digits is 94058496, while the sum is 67.

The square root of 6626869987 is about 81405.5894088360. The cubic root of 6626869987 is about 1878.3195700600.

The spelling of 6626869987 in words is "six billion, six hundred twenty-six million, eight hundred sixty-nine thousand, nine hundred eighty-seven".