1660503134401 has 2 divisors, whose sum is σ = 1660503134402. Its totient is φ = 1660503134400.

The previous prime is 1660503134377. The next prime is 1660503134429. The reversal of 1660503134401 is 1044313050661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1452690236176 + 207812898225 = 1205276^2 + 455865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660503134401 - 2⁷ = 1660503134273 is a prime.

It is not a weakly prime, because it can be changed into another prime (1660503134701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830251567200 + 830251567201.

It is an arithmetic number, because the mean of its divisors is an integer number (830251567201).

Almost surely, 2^{1660503134401} is an apocalyptic number.

It is an amenable number.

1660503134401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660503134401 is an equidigital number, since it uses as much as digits as its factorization.

1660503134401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 1660503134401 in words is "one trillion, six hundred sixty billion, five hundred three million, one hundred thirty-four thousand, four hundred one".