6645441701 has 4 divisors (see below), whose sum is σ = 6675242112. Its totient is φ = 6615641292.

The previous prime is 6645441683. The next prime is 6645441731. The reversal of 6645441701 is 1071445466.

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 a de Polignac number, because none of the positive numbers 2^k-6645441701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645441731) 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, 14899871 + ... + 14900316.

It is an arithmetic number, because the mean of its divisors is an integer number (1668810528).

Almost surely, 2^6645441701 is an apocalyptic number.

It is an amenable number.

6645441701 is a deficient number, since it is larger than the sum of its proper divisors (29800411).

6645441701 is a wasteful number, since it uses less digits than its factorization.

6645441701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29800410.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 6645441701 is about 81519.5786360553. The cubic root of 6645441701 is about 1880.0725885848.

The spelling of 6645441701 in words is "six billion, six hundred forty-five million, four hundred forty-one thousand, seven hundred one".