1665132373 has 2 divisors, whose sum is σ = 1665132374. Its totient is φ = 1665132372.

The previous prime is 1665132367. The next prime is 1665132401. The reversal of 1665132373 is 3732315661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1608250609 + 56881764 = 40103^2 + 7542^2 .

It is an emirp because it is prime and its reverse (3732315661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1665132373 - 2⁵ = 1665132341 is a prime.

It is a super-2 number, since 2×1665132373² = 5545331639225222258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1665136373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832566186 + 832566187.

It is an arithmetic number, because the mean of its divisors is an integer number (832566187).

Almost surely, 2^1665132373 is an apocalyptic number.

It is an amenable number.

1665132373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665132373 is an equidigital number, since it uses as much as digits as its factorization.

1665132373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 37.

The square root of 1665132373 is about 40806.0335367210. The cubic root of 1665132373 is about 1185.2671685398.

The spelling of 1665132373 in words is "one billion, six hundred sixty-five million, one hundred thirty-two thousand, three hundred seventy-three".