6625987 has 2 divisors, whose sum is σ = 6625988. Its totient is φ = 6625986.

The previous prime is 6625979. The next prime is 6626029. The reversal of 6625987 is 7895266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6625987 - 2³ = 6625979 is a prime.

6625987 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (6625907) 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 as a sum of consecutive naturals, namely, 3312993 + 3312994.

It is an arithmetic number, because the mean of its divisors is an integer number (3312994).

Almost surely, 2^6625987 is an apocalyptic number.

6625987 is a deficient number, since it is larger than the sum of its proper divisors (1).

6625987 is an equidigital number, since it uses as much as digits as its factorization.

6625987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 6625987 is about 2574.0992599354. The cubic root of 6625987 is about 187.8236141763.

The spelling of 6625987 in words is "six million, six hundred twenty-five thousand, nine hundred eighty-seven".