101580066409 has 2 divisors, whose sum is σ = 101580066410. Its totient is φ = 101580066408.

The previous prime is 101580066397. The next prime is 101580066463. The reversal of 101580066409 is 904660085101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72577976409 + 29002090000 = 269403^2 + 170300^2 .

It is an emirp because it is prime and its reverse (904660085101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101580066409 - 2⁷ = 101580066281 is a prime.

It is not a weakly prime, because it can be changed into another prime (101580036409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50790033204 + 50790033205.

It is an arithmetic number, because the mean of its divisors is an integer number (50790033205).

Almost surely, 2^101580066409 is an apocalyptic number.

It is an amenable number.

101580066409 is a deficient number, since it is larger than the sum of its proper divisors (1).

101580066409 is an equidigital number, since it uses as much as digits as its factorization.

101580066409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 101580066409 in words is "one hundred one billion, five hundred eighty million, sixty-six thousand, four hundred nine".