5661661103 has 8 divisors (see below), whose sum is σ = 6471104640. Its totient is φ = 4852376280.

The previous prime is 5661661069. The next prime is 5661661111. The reversal of 5661661103 is 3011661665.

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 5661661103 - 2¹⁰ = 5661660079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661661133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50408 + ... + 117746.

It is an arithmetic number, because the mean of its divisors is an integer number (808888080).

Almost surely, 2^5661661103 is an apocalyptic number.

5661661103 is a deficient number, since it is larger than the sum of its proper divisors (809443537).

5661661103 is a wasteful number, since it uses less digits than its factorization.

5661661103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79357.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 5661661103 is about 75244.0104127897. The cubic root of 5661661103 is about 1782.3019813902.

The spelling of 5661661103 in words is "five billion, six hundred sixty-one million, six hundred sixty-one thousand, one hundred three".