6638022007 has 2 divisors, whose sum is σ = 6638022008. Its totient is φ = 6638022006.

The previous prime is 6638021993. The next prime is 6638022029. The reversal of 6638022007 is 7002208366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6638022007 - 2¹¹ = 6638019959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6638022107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3319011003 + 3319011004.

It is an arithmetic number, because the mean of its divisors is an integer number (3319011004).

Almost surely, 2^6638022007 is an apocalyptic number.

6638022007 is a deficient number, since it is larger than the sum of its proper divisors (1).

6638022007 is an equidigital number, since it uses as much as digits as its factorization.

6638022007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 6638022007 is about 81474.0572636468. The cubic root of 6638022007 is about 1879.3726221637.

The spelling of 6638022007 in words is "six billion, six hundred thirty-eight million, twenty-two thousand, seven".