665043433 has 2 divisors, whose sum is σ = 665043434. Its totient is φ = 665043432.

The previous prime is 665043427. The next prime is 665043437. The reversal of 665043433 is 334340566.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 628404624 + 36638809 = 25068^2 + 6053^2 .

It is a cyclic number.

It is not a de Polignac number, because 665043433 - 2¹⁷ = 664912361 is a prime.

It is not a weakly prime, because it can be changed into another prime (665043437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332521716 + 332521717.

It is an arithmetic number, because the mean of its divisors is an integer number (332521717).

Almost surely, 2^665043433 is an apocalyptic number.

It is an amenable number.

665043433 is a deficient number, since it is larger than the sum of its proper divisors (1).

665043433 is an equidigital number, since it uses as much as digits as its factorization.

665043433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 34.

The square root of 665043433 is about 25788.4360324545. The cubic root of 665043433 is about 872.8708758996.

Adding to 665043433 its reverse (334340566), we get a palindrome (999383999).

The spelling of 665043433 in words is "six hundred sixty-five million, forty-three thousand, four hundred thirty-three".