1660712819629 has 2 divisors, whose sum is σ = 1660712819630. Its totient is φ = 1660712819628.

The previous prime is 1660712819627. The next prime is 1660712819639. The reversal of 1660712819629 is 9269182170661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1597974092100 + 62738727529 = 1264110^2 + 250477^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660712819629 - 2¹ = 1660712819627 is a prime.

Together with 1660712819627, 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 (1660712819627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830356409814 + 830356409815.

It is an arithmetic number, because the mean of its divisors is an integer number (830356409815).

Almost surely, 2^{1660712819629} is an apocalyptic number.

It is an amenable number.

1660712819629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660712819629 is an equidigital number, since it uses as much as digits as its factorization.

1660712819629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The spelling of 1660712819629 in words is "one trillion, six hundred sixty billion, seven hundred twelve million, eight hundred nineteen thousand, six hundred twenty-nine".