6663939241601 has 4 divisors (see below), whose sum is σ = 6776887364400. Its totient is φ = 6550991118804.

The previous prime is 6663939241543. The next prime is 6663939241621. The reversal of 6663939241601 is 1061429393666.

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-6663939241601 is a prime.

It is a super-2 number, since 2×6663939241601² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6663939241621) 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, 56474061311 + ... + 56474061428.

It is an arithmetic number, because the mean of its divisors is an integer number (1694221841100).

Almost surely, 2^{6663939241601} is an apocalyptic number.

It is an amenable number.

6663939241601 is a deficient number, since it is larger than the sum of its proper divisors (112948122799).

6663939241601 is a wasteful number, since it uses less digits than its factorization.

6663939241601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112948122798.

The product of its (nonzero) digits is 7558272, while the sum is 56.

The spelling of 6663939241601 in words is "six trillion, six hundred sixty-three billion, nine hundred thirty-nine million, two hundred forty-one thousand, six hundred one".