1664101490671 has 2 divisors, whose sum is σ = 1664101490672. Its totient is φ = 1664101490670.

The previous prime is 1664101490669. The next prime is 1664101490741. The reversal of 1664101490671 is 1760941014661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1664101490671 - 2¹ = 1664101490669 is a prime.

Together with 1664101490669, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1664101490621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832050745335 + 832050745336.

It is an arithmetic number, because the mean of its divisors is an integer number (832050745336).

Almost surely, 2^{1664101490671} is an apocalyptic number.

1664101490671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1664101490671 is an equidigital number, since it uses as much as digits as its factorization.

1664101490671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 1664101490671 in words is "one trillion, six hundred sixty-four billion, one hundred one million, four hundred ninety thousand, six hundred seventy-one".