1665103373 has 2 divisors, whose sum is σ = 1665103374. Its totient is φ = 1665103372.

The previous prime is 1665103337. The next prime is 1665103387. The reversal of 1665103373 is 3733015661.

Together with previous prime (1665103337) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1108756804 + 556346569 = 33298^2 + 23587^2 .

It is a cyclic number.

It is not a de Polignac number, because 1665103373 - 2⁶ = 1665103309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1665103073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832551686 + 832551687.

It is an arithmetic number, because the mean of its divisors is an integer number (832551687).

Almost surely, 2^1665103373 is an apocalyptic number.

It is an amenable number.

1665103373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665103373 is an equidigital number, since it uses as much as digits as its factorization.

1665103373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 35.

The square root of 1665103373 is about 40805.6781955649. The cubic root of 1665103373 is about 1185.2602876159.

The spelling of 1665103373 in words is "one billion, six hundred sixty-five million, one hundred three thousand, three hundred seventy-three".