6661001103 has 8 divisors (see below), whose sum is σ = 8916719616. Its totient is φ = 4422975000.

The previous prime is 6661001099. The next prime is 6661001111. The reversal of 6661001103 is 3011001666.

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

It is not a de Polignac number, because 6661001103 - 2² = 6661001099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6661001173) 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, 4422223 + ... + 4423728.

It is an arithmetic number, because the mean of its divisors is an integer number (1114589952).

Almost surely, 2^6661001103 is an apocalyptic number.

6661001103 is a deficient number, since it is larger than the sum of its proper divisors (2255718513).

6661001103 is a wasteful number, since it uses less digits than its factorization.

6661001103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8846205.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 6661001103 is about 81614.9563683030. The cubic root of 6661001103 is about 1881.5387567075.

Adding to 6661001103 its reverse (3011001666), we get a palindrome (9672002769).

The spelling of 6661001103 in words is "six billion, six hundred sixty-one million, one thousand, one hundred three".