5661660111007 has 2 divisors, whose sum is σ = 5661660111008. Its totient is φ = 5661660111006.

The previous prime is 5661660110993. The next prime is 5661660111011. The reversal of 5661660111007 is 7001110661665.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5661660111007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661660111047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830830055503 + 2830830055504.

It is an arithmetic number, because the mean of its divisors is an integer number (2830830055504).

Almost surely, 2^{5661660111007} is an apocalyptic number.

5661660111007 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661660111007 is an equidigital number, since it uses as much as digits as its factorization.

5661660111007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 40.

The spelling of 5661660111007 in words is "five trillion, six hundred sixty-one billion, six hundred sixty million, one hundred eleven thousand, seven".