1660456154393 has 2 divisors, whose sum is σ = 1660456154394. Its totient is φ = 1660456154392.

The previous prime is 1660456154353. The next prime is 1660456154411. The reversal of 1660456154393 is 3934516540661.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1588376254864 + 72079899529 = 1260308^2 + 268477^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660456154393 - 2³² = 1656161187097 is a prime.

It is a super-2 number, since 2×1660456154393² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1660456154353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830228077196 + 830228077197.

It is an arithmetic number, because the mean of its divisors is an integer number (830228077197).

Almost surely, 2^{1660456154393} is an apocalyptic number.

It is an amenable number.

1660456154393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660456154393 is an equidigital number, since it uses as much as digits as its factorization.

1660456154393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 1660456154393 in words is "one trillion, six hundred sixty billion, four hundred fifty-six million, one hundred fifty-four thousand, three hundred ninety-three".