666892943 has 2 divisors, whose sum is σ = 666892944. Its totient is φ = 666892942.

The previous prime is 666892901. The next prime is 666892973. The reversal of 666892943 is 349298666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666892943 - 2⁶ = 666892879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666892973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333446471 + 333446472.

It is an arithmetic number, because the mean of its divisors is an integer number (333446472).

Almost surely, 2^666892943 is an apocalyptic number.

666892943 is a deficient number, since it is larger than the sum of its proper divisors (1).

666892943 is an equidigital number, since it uses as much as digits as its factorization.

666892943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 53.

The square root of 666892943 is about 25824.2704253189. The cubic root of 666892943 is about 873.6792888486.

The spelling of 666892943 in words is "six hundred sixty-six million, eight hundred ninety-two thousand, nine hundred forty-three".