1664101490741 has 2 divisors, whose sum is σ = 1664101490742. Its totient is φ = 1664101490740.

The previous prime is 1664101490671. The next prime is 1664101490743. The reversal of 1664101490741 is 1470941014661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1448917764100 + 215183726641 = 1203710^2 + 463879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1664101490741 is a prime.

It is a Sophie Germain prime.

Together with 1664101490743, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1664101490692 and 1664101490701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664101490743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832050745370 + 832050745371.

It is an arithmetic number, because the mean of its divisors is an integer number (832050745371).

Almost surely, 2^{1664101490741} is an apocalyptic number.

It is an amenable number.

1664101490741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664101490741 is an equidigital number, since it uses as much as digits as its factorization.

1664101490741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 1664101490741 in words is "one trillion, six hundred sixty-four billion, one hundred one million, four hundred ninety thousand, seven hundred forty-one".