6601028641 has 4 divisors (see below), whose sum is σ = 6601806484. Its totient is φ = 6600250800.

The previous prime is 6601028627. The next prime is 6601028647. The reversal of 6601028641 is 1468201066.

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

It can be written as a sum of positive squares in 2 ways, for example, as 749390625 + 5851638016 = 27375^2 + 76496^2 .

It is a cyclic number.

It is not a de Polignac number, because 6601028641 - 2²⁵ = 6567474209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6601028597 and 6601028606.

It is not an unprimeable number, because it can be changed into a prime (6601028647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376050 + ... + 393211.

It is an arithmetic number, because the mean of its divisors is an integer number (1650451621).

Almost surely, 2^6601028641 is an apocalyptic number.

It is an amenable number.

6601028641 is a deficient number, since it is larger than the sum of its proper divisors (777843).

6601028641 is an equidigital number, since it uses as much as digits as its factorization.

6601028641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777842.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 6601028641 is about 81246.7146474244. The cubic root of 6601028641 is about 1875.8748998803.

The spelling of 6601028641 in words is "six billion, six hundred one million, twenty-eight thousand, six hundred forty-one".