666426011 has 2 divisors, whose sum is σ = 666426012. Its totient is φ = 666426010.

The previous prime is 666425983. The next prime is 666426031. The reversal of 666426011 is 110624666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666426011 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (666426031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333213005 + 333213006.

It is an arithmetic number, because the mean of its divisors is an integer number (333213006).

Almost surely, 2^666426011 is an apocalyptic number.

666426011 is a deficient number, since it is larger than the sum of its proper divisors (1).

666426011 is an equidigital number, since it uses as much as digits as its factorization.

666426011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 666426011 is about 25815.2282771236. The cubic root of 666426011 is about 873.4753360408.

The spelling of 666426011 in words is "six hundred sixty-six million, four hundred twenty-six thousand, eleven".