667406011 has 2 divisors, whose sum is σ = 667406012. Its totient is φ = 667406010.

The previous prime is 667405997. The next prime is 667406023. The reversal of 667406011 is 110604766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667406011 - 2⁷ = 667405883 is a prime.

It is not a weakly prime, because it can be changed into another prime (667400011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333703005 + 333703006.

It is an arithmetic number, because the mean of its divisors is an integer number (333703006).

Almost surely, 2^667406011 is an apocalyptic number.

667406011 is a deficient number, since it is larger than the sum of its proper divisors (1).

667406011 is an equidigital number, since it uses as much as digits as its factorization.

667406011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 667406011 is about 25834.2023488243. The cubic root of 667406011 is about 873.9032838116.

The spelling of 667406011 in words is "six hundred sixty-seven million, four hundred six thousand, eleven".