6663907 has 2 divisors, whose sum is σ = 6663908. Its totient is φ = 6663906.

The previous prime is 6663901. The next prime is 6663911. The reversal of 6663907 is 7093666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6663907 is a prime.

It is not a weakly prime, because it can be changed into another prime (6663901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3331953 + 3331954.

It is an arithmetic number, because the mean of its divisors is an integer number (3331954).

Almost surely, 2^6663907 is an apocalyptic number.

6663907 is a deficient number, since it is larger than the sum of its proper divisors (1).

6663907 is an equidigital number, since it uses as much as digits as its factorization.

6663907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 6663907 is about 2581.4544350036. The cubic root of 6663907 is about 188.1812327344.

It can be divided in two parts, 666 and 3907, that multiplied together give a palindrome (2602062).

The spelling of 6663907 in words is "six million, six hundred sixty-three thousand, nine hundred seven".