6600866387 has 2 divisors, whose sum is σ = 6600866388. Its totient is φ = 6600866386.

The previous prime is 6600866357. The next prime is 6600866429. The reversal of 6600866387 is 7836680066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6600866387 - 2¹⁸ = 6600604243 is a prime.

It is not a weakly prime, because it can be changed into another prime (6600866357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3300433193 + 3300433194.

It is an arithmetic number, because the mean of its divisors is an integer number (3300433194).

Almost surely, 2^6600866387 is an apocalyptic number.

6600866387 is a deficient number, since it is larger than the sum of its proper divisors (1).

6600866387 is an equidigital number, since it uses as much as digits as its factorization.

6600866387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The square root of 6600866387 is about 81245.7161147589. The cubic root of 6600866387 is about 1875.8595300182.

The spelling of 6600866387 in words is "six billion, six hundred million, eight hundred sixty-six thousand, three hundred eighty-seven".