1660431065947 has 2 divisors, whose sum is σ = 1660431065948. Its totient is φ = 1660431065946.

The previous prime is 1660431065899. The next prime is 1660431065987. The reversal of 1660431065947 is 7495601340661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1660431065947 - 2¹¹ = 1660431063899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660431065894 and 1660431065903.

It is not a weakly prime, because it can be changed into another prime (1660431065987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830215532973 + 830215532974.

It is an arithmetic number, because the mean of its divisors is an integer number (830215532974).

Almost surely, 2^{1660431065947} is an apocalyptic number.

1660431065947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660431065947 is an equidigital number, since it uses as much as digits as its factorization.

1660431065947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 1660431065947 in words is "one trillion, six hundred sixty billion, four hundred thirty-one million, sixty-five thousand, nine hundred forty-seven".