5661665015001 has 4 divisors (see below), whose sum is σ = 7548886686672. Its totient is φ = 3774443343332.

The previous prime is 5661665014981. The next prime is 5661665015011. The reversal of 5661665015001 is 1005105661665.

5661665015001 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 5661665015001 - 2¹⁷ = 5661664883929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5661665015011) 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 3 ways as a sum of consecutive naturals, for example, 943610835831 + ... + 943610835836.

It is an arithmetic number, because the mean of its divisors is an integer number (1887221671668).

Almost surely, 2^{5661665015001} is an apocalyptic number.

It is an amenable number.

5661665015001 is a deficient number, since it is larger than the sum of its proper divisors (1887221671671).

5661665015001 is a wasteful number, since it uses less digits than its factorization.

5661665015001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887221671670.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 5661665015001 in words is "five trillion, six hundred sixty-one billion, six hundred sixty-five million, fifteen thousand, one".