1665106500419 has 2 divisors, whose sum is σ = 1665106500420. Its totient is φ = 1665106500418.

The previous prime is 1665106500403. The next prime is 1665106500437. The reversal of 1665106500419 is 9140056015661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1665106500419 - 2⁴ = 1665106500403 is a prime.

It is a super-2 number, since 2×1665106500419² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1665106500419.

It is not a weakly prime, because it can be changed into another prime (1665106500479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832553250209 + 832553250210.

It is an arithmetic number, because the mean of its divisors is an integer number (832553250210).

Almost surely, 2^{1665106500419} is an apocalyptic number.

1665106500419 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665106500419 is an equidigital number, since it uses as much as digits as its factorization.

1665106500419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 1665106500419 in words is "one trillion, six hundred sixty-five billion, one hundred six million, five hundred thousand, four hundred nineteen".