1664998334999 has 2 divisors, whose sum is σ = 1664998335000. Its totient is φ = 1664998334998.

The previous prime is 1664998334969. The next prime is 1664998335031. The reversal of 1664998334999 is 9994338994661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1664998334999 - 2²⁰ = 1664997286423 is a prime.

It is a super-3 number, since 3×1664998334999³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664998334969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832499167499 + 832499167500.

It is an arithmetic number, because the mean of its divisors is an integer number (832499167500).

Almost surely, 2^{1664998334999} is an apocalyptic number.

1664998334999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664998334999 is an equidigital number, since it uses as much as digits as its factorization.

1664998334999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2448880128, while the sum is 80.

The spelling of 1664998334999 in words is "one trillion, six hundred sixty-four billion, nine hundred ninety-eight million, three hundred thirty-four thousand, nine hundred ninety-nine".