16661124140651 has 2 divisors, whose sum is σ = 16661124140652. Its totient is φ = 16661124140650.

The previous prime is 16661124140627. The next prime is 16661124140707. The reversal of 16661124140651 is 15604142116661.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16661124140651 is a prime.

It is not a weakly prime, because it can be changed into another prime (16661124142651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8330562070325 + 8330562070326.

It is an arithmetic number, because the mean of its divisors is an integer number (8330562070326).

Almost surely, 2^{16661124140651} is an apocalyptic number.

16661124140651 is a deficient number, since it is larger than the sum of its proper divisors (1).

16661124140651 is an equidigital number, since it uses as much as digits as its factorization.

16661124140651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 16661124140651 in words is "sixteen trillion, six hundred sixty-one billion, one hundred twenty-four million, one hundred forty thousand, six hundred fifty-one".