6601377859 has 4 divisors (see below), whose sum is σ = 6680912616. Its totient is φ = 6521843104.

The previous prime is 6601377857. The next prime is 6601377869. The reversal of 6601377859 is 9587731066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6601377859 - 2¹ = 6601377857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6601377857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39767254 + ... + 39767419.

It is an arithmetic number, because the mean of its divisors is an integer number (1670228154).

Almost surely, 2^6601377859 is an apocalyptic number.

6601377859 is a deficient number, since it is larger than the sum of its proper divisors (79534757).

6601377859 is an equidigital number, since it uses as much as digits as its factorization.

6601377859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79534756.

The product of its (nonzero) digits is 1905120, while the sum is 52.

The square root of 6601377859 is about 81248.8637397472. The cubic root of 6601377859 is about 1875.9079794585.

The spelling of 6601377859 in words is "six billion, six hundred one million, three hundred seventy-seven thousand, eight hundred fifty-nine".