6657622087 has 2 divisors, whose sum is σ = 6657622088. Its totient is φ = 6657622086.

The previous prime is 6657622057. The next prime is 6657622091. The reversal of 6657622087 is 7802267566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6657622087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6657622087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6657622057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328811043 + 3328811044.

It is an arithmetic number, because the mean of its divisors is an integer number (3328811044).

Almost surely, 2^6657622087 is an apocalyptic number.

6657622087 is a deficient number, since it is larger than the sum of its proper divisors (1).

6657622087 is an equidigital number, since it uses as much as digits as its factorization.

6657622087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The square root of 6657622087 is about 81594.2527816757. The cubic root of 6657622087 is about 1881.2205450339.

The spelling of 6657622087 in words is "six billion, six hundred fifty-seven million, six hundred twenty-two thousand, eighty-seven".