6663141661 has 8 divisors (see below), whose sum is σ = 7269672384. Its totient is φ = 6056742720.

The previous prime is 6663141659. The next prime is 6663141677. The reversal of 6663141661 is 1661413666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6663141661 - 2¹ = 6663141659 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 (6663141601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94101 + ... + 148933.

It is an arithmetic number, because the mean of its divisors is an integer number (908709048).

Almost surely, 2^6663141661 is an apocalyptic number.

It is an amenable number.

6663141661 is a deficient number, since it is larger than the sum of its proper divisors (606530723).

6663141661 is a wasteful number, since it uses less digits than its factorization.

6663141661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65891.

The product of its digits is 93312, while the sum is 40.

The square root of 6663141661 is about 81628.0690755331. The cubic root of 6663141661 is about 1881.7402835465.

The spelling of 6663141661 in words is "six billion, six hundred sixty-three million, one hundred forty-one thousand, six hundred sixty-one".