1344886661 has 2 divisors, whose sum is σ = 1344886662. Its totient is φ = 1344886660.

The previous prime is 1344886591. The next prime is 1344886663. The reversal of 1344886661 is 1666884431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1312612900 + 32273761 = 36230^2 + 5681^2 .

It is an emirp because it is prime and its reverse (1666884431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1344886661 - 2¹⁰ = 1344885637 is a prime.

Together with 1344886663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1344886663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672443330 + 672443331.

It is an arithmetic number, because the mean of its divisors is an integer number (672443331).

Almost surely, 2^1344886661 is an apocalyptic number.

It is an amenable number.

1344886661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1344886661 is an equidigital number, since it uses as much as digits as its factorization.

1344886661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 47.

The square root of 1344886661 is about 36672.6963966382. The cubic root of 1344886661 is about 1103.8122987990.

The spelling of 1344886661 in words is "one billion, three hundred forty-four million, eight hundred eighty-six thousand, six hundred sixty-one".