66001611001043 has 2 divisors, whose sum is σ = 66001611001044. Its totient is φ = 66001611001042.

The previous prime is 66001611000979. The next prime is 66001611001217. The reversal of 66001611001043 is 34010011610066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66001611001043 - 2⁶ = 66001611000979 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 66001611000997 and 66001611001015.

It is not a weakly prime, because it can be changed into another prime (66001611001243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33000805500521 + 33000805500522.

It is an arithmetic number, because the mean of its divisors is an integer number (33000805500522).

Almost surely, 2^{66001611001043} is an apocalyptic number.

66001611001043 is a deficient number, since it is larger than the sum of its proper divisors (1).

66001611001043 is an equidigital number, since it uses as much as digits as its factorization.

66001611001043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 66001611001043 in words is "sixty-six trillion, one billion, six hundred eleven million, one thousand, forty-three".