1660465543691 has 2 divisors, whose sum is σ = 1660465543692. Its totient is φ = 1660465543690.

The previous prime is 1660465543661. The next prime is 1660465543717. The reversal of 1660465543691 is 1963455640661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1660465543691 - 2²² = 1660461349387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1660465543621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830232771845 + 830232771846.

It is an arithmetic number, because the mean of its divisors is an integer number (830232771846).

Almost surely, 2^{1660465543691} is an apocalyptic number.

1660465543691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660465543691 is an equidigital number, since it uses as much as digits as its factorization.

1660465543691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13996800, while the sum is 56.

The spelling of 1660465543691 in words is "one trillion, six hundred sixty billion, four hundred sixty-five million, five hundred forty-three thousand, six hundred ninety-one".