666879833 has 2 divisors, whose sum is σ = 666879834. Its totient is φ = 666879832.

The previous prime is 666879827. The next prime is 666879901. The reversal of 666879833 is 338978666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 516743824 + 150136009 = 22732^2 + 12253^2 .

It is a cyclic number.

It is not a de Polignac number, because 666879833 - 2¹⁶ = 666814297 is a prime.

It is not a weakly prime, because it can be changed into another prime (666879133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333439916 + 333439917.

It is an arithmetic number, because the mean of its divisors is an integer number (333439917).

Almost surely, 2^666879833 is an apocalyptic number.

It is an amenable number.

666879833 is a deficient number, since it is larger than the sum of its proper divisors (1).

666879833 is an equidigital number, since it uses as much as digits as its factorization.

666879833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 56.

The square root of 666879833 is about 25824.0165930864. The cubic root of 666879833 is about 873.6735637865.

The spelling of 666879833 in words is "six hundred sixty-six million, eight hundred seventy-nine thousand, eight hundred thirty-three".