6600165643 has 2 divisors, whose sum is σ = 6600165644. Its totient is φ = 6600165642.

The previous prime is 6600165617. The next prime is 6600165653. The reversal of 6600165643 is 3465610066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6600165643 - 2²⁵ = 6566611211 is a prime.

It is not a weakly prime, because it can be changed into another prime (6600165653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3300082821 + 3300082822.

It is an arithmetic number, because the mean of its divisors is an integer number (3300082822).

Almost surely, 2^6600165643 is an apocalyptic number.

6600165643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6600165643 is an equidigital number, since it uses as much as digits as its factorization.

6600165643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 6600165643 is about 81241.4035021552. The cubic root of 6600165643 is about 1875.7931476298.

The spelling of 6600165643 in words is "six billion, six hundred million, one hundred sixty-five thousand, six hundred forty-three".