1665053837 has 2 divisors, whose sum is σ = 1665053838. Its totient is φ = 1665053836.

The previous prime is 1665053759. The next prime is 1665053839. The reversal of 1665053837 is 7383505661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1624170601 + 40883236 = 40301^2 + 6394^2 .

It is a cyclic number.

It is not a de Polignac number, because 1665053837 - 2¹⁰ = 1665052813 is a prime.

Together with 1665053839, 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 (1665053839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832526918 + 832526919.

It is an arithmetic number, because the mean of its divisors is an integer number (832526919).

Almost surely, 2^1665053837 is an apocalyptic number.

It is an amenable number.

1665053837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665053837 is an equidigital number, since it uses as much as digits as its factorization.

1665053837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 1665053837 is about 40805.0712167005. The cubic root of 1665053837 is about 1185.2485338640.

The spelling of 1665053837 in words is "one billion, six hundred sixty-five million, fifty-three thousand, eight hundred thirty-seven".