66451161046139 has 2 divisors, whose sum is σ = 66451161046140. Its totient is φ = 66451161046138.

The previous prime is 66451161046129. The next prime is 66451161046273. The reversal of 66451161046139 is 93164016115466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66451161046139 - 2¹² = 66451161042043 is a prime.

It is not a weakly prime, because it can be changed into another prime (66451161046129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33225580523069 + 33225580523070.

It is an arithmetic number, because the mean of its divisors is an integer number (33225580523070).

Almost surely, 2^{66451161046139} is an apocalyptic number.

66451161046139 is a deficient number, since it is larger than the sum of its proper divisors (1).

66451161046139 is an equidigital number, since it uses as much as digits as its factorization.

66451161046139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 66451161046139 in words is "sixty-six trillion, four hundred fifty-one billion, one hundred sixty-one million, forty-six thousand, one hundred thirty-nine".