66562747099 has 2 divisors, whose sum is σ = 66562747100. Its totient is φ = 66562747098.

The previous prime is 66562747081. The next prime is 66562747157. The reversal of 66562747099 is 99074726566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66562747099 - 2¹⁵ = 66562714331 is a prime.

It is not a weakly prime, because it can be changed into another prime (66562747049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33281373549 + 33281373550.

It is an arithmetic number, because the mean of its divisors is an integer number (33281373550).

Almost surely, 2^66562747099 is an apocalyptic number.

66562747099 is a deficient number, since it is larger than the sum of its proper divisors (1).

66562747099 is an equidigital number, since it uses as much as digits as its factorization.

66562747099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34292160, while the sum is 61.

The spelling of 66562747099 in words is "sixty-six billion, five hundred sixty-two million, seven hundred forty-seven thousand, ninety-nine".