1665764493143 has 2 divisors, whose sum is σ = 1665764493144. Its totient is φ = 1665764493142.

The previous prime is 1665764493109. The next prime is 1665764493233. The reversal of 1665764493143 is 3413944675661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1665764493143 - 2²⁰ = 1665763444567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1665764493643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832882246571 + 832882246572.

It is an arithmetic number, because the mean of its divisors is an integer number (832882246572).

Almost surely, 2^{1665764493143} is an apocalyptic number.

1665764493143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665764493143 is an equidigital number, since it uses as much as digits as its factorization.

1665764493143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39191040, while the sum is 59.

The spelling of 1665764493143 in words is "one trillion, six hundred sixty-five billion, seven hundred sixty-four million, four hundred ninety-three thousand, one hundred forty-three".