6661141807 has 4 divisors (see below), whose sum is σ = 7052973696. Its totient is φ = 6269309920.

The previous prime is 6661141777. The next prime is 6661141853. The reversal of 6661141807 is 7081411666.

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 6661141807 - 2¹¹ = 6661139759 is a prime.

It is a super-4 number, since 4×6661141807⁴ (a number of 40 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6661141807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661148807) 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, 195915919 + ... + 195915952.

It is an arithmetic number, because the mean of its divisors is an integer number (1763243424).

Almost surely, 2^6661141807 is an apocalyptic number.

6661141807 is a deficient number, since it is larger than the sum of its proper divisors (391831889).

6661141807 is a wasteful number, since it uses less digits than its factorization.

6661141807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391831888.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 6661141807 is about 81615.8183626189. The cubic root of 6661141807 is about 1881.5520048745.

The spelling of 6661141807 in words is "six billion, six hundred sixty-one million, one hundred forty-one thousand, eight hundred seven".