666151099 has 2 divisors, whose sum is σ = 666151100. Its totient is φ = 666151098.

The previous prime is 666151043. The next prime is 666151151. The reversal of 666151099 is 990151666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666151099 - 2²¹ = 664053947 is a prime.

It is not a weakly prime, because it can be changed into another prime (666151009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333075549 + 333075550.

It is an arithmetic number, because the mean of its divisors is an integer number (333075550).

Almost surely, 2^666151099 is an apocalyptic number.

666151099 is a deficient number, since it is larger than the sum of its proper divisors (1).

666151099 is an equidigital number, since it uses as much as digits as its factorization.

666151099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 666151099 is about 25809.9031187643. The cubic root of 666151099 is about 873.3552117388.

The spelling of 666151099 in words is "six hundred sixty-six million, one hundred fifty-one thousand, ninety-nine".