1660655001913 has 2 divisors, whose sum is σ = 1660655001914. Its totient is φ = 1660655001912.

The previous prime is 1660655001911. The next prime is 1660655002129. The reversal of 1660655001913 is 3191005560661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1642990731264 + 17664270649 = 1281792^2 + 132907^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660655001913 - 2¹ = 1660655001911 is a prime.

Together with 1660655001911, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1660655001913.

It is not a weakly prime, because it can be changed into another prime (1660655001911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830327500956 + 830327500957.

It is an arithmetic number, because the mean of its divisors is an integer number (830327500957).

Almost surely, 2^{1660655001913} is an apocalyptic number.

It is an amenable number.

1660655001913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660655001913 is an equidigital number, since it uses as much as digits as its factorization.

1660655001913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 43.

The spelling of 1660655001913 in words is "one trillion, six hundred sixty billion, six hundred fifty-five million, one thousand, nine hundred thirteen".