6661253741 has 8 divisors (see below), whose sum is σ = 6914509824. Its totient is φ = 6412644720.

The previous prime is 6661253657. The next prime is 6661253747. The reversal of 6661253741 is 1473521666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6661253741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661253747) 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, 1158845 + ... + 1164578.

It is an arithmetic number, because the mean of its divisors is an integer number (864313728).

Almost surely, 2^6661253741 is an apocalyptic number.

6661253741 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

6661253741 is a deficient number, since it is larger than the sum of its proper divisors (253256083).

6661253741 is a wasteful number, since it uses less digits than its factorization.

6661253741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323531.

The product of its digits is 181440, while the sum is 41.

The square root of 6661253741 is about 81616.5040969043. The cubic root of 6661253741 is about 1881.5625440318.

The spelling of 6661253741 in words is "six billion, six hundred sixty-one million, two hundred fifty-three thousand, seven hundred forty-one".