666432433 has 2 divisors, whose sum is σ = 666432434. Its totient is φ = 666432432.

The previous prime is 666432379. The next prime is 666432443. The reversal of 666432433 is 334234666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379197729 + 287234704 = 19473^2 + 16948^2 .

It is a cyclic number.

It is not a de Polignac number, because 666432433 - 2⁹ = 666431921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 666432392 and 666432401.

It is not a weakly prime, because it can be changed into another prime (666432443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333216216 + 333216217.

It is an arithmetic number, because the mean of its divisors is an integer number (333216217).

Almost surely, 2^666432433 is an apocalyptic number.

It is an amenable number.

666432433 is a deficient number, since it is larger than the sum of its proper divisors (1).

666432433 is an equidigital number, since it uses as much as digits as its factorization.

666432433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 37.

The square root of 666432433 is about 25815.3526607715. The cubic root of 666432433 is about 873.4781417739.

The spelling of 666432433 in words is "six hundred sixty-six million, four hundred thirty-two thousand, four hundred thirty-three".