6606065085781 has 4 divisors (see below), whose sum is σ = 7549788669472. Its totient is φ = 5662341502092.

The previous prime is 6606065085749. The next prime is 6606065085791. The reversal of 6606065085781 is 1875805606066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6606065085781 - 2⁵ = 6606065085749 is a prime.

It is a super-2 number, since 2×6606065085781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6606065085731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 471861791835 + ... + 471861791848.

It is an arithmetic number, because the mean of its divisors is an integer number (1887447167368).

Almost surely, 2^{6606065085781} is an apocalyptic number.

It is an amenable number.

6606065085781 is a deficient number, since it is larger than the sum of its proper divisors (943723583691).

6606065085781 is an equidigital number, since it uses as much as digits as its factorization.

6606065085781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943723583690.

The product of its (nonzero) digits is 14515200, while the sum is 58.

The spelling of 6606065085781 in words is "six trillion, six hundred six billion, sixty-five million, eighty-five thousand, seven hundred eighty-one".