666075499 has 2 divisors, whose sum is σ = 666075500. Its totient is φ = 666075498.

The previous prime is 666075481. The next prime is 666075661. The reversal of 666075499 is 994570666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666075499 - 2¹¹ = 666073451 is a prime.

It is not a weakly prime, because it can be changed into another prime (666075439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333037749 + 333037750.

It is an arithmetic number, because the mean of its divisors is an integer number (333037750).

Almost surely, 2^666075499 is an apocalyptic number.

666075499 is a deficient number, since it is larger than the sum of its proper divisors (1).

666075499 is an equidigital number, since it uses as much as digits as its factorization.

666075499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The square root of 666075499 is about 25808.4385230878. The cubic root of 666075499 is about 873.3221721116.

The spelling of 666075499 in words is "six hundred sixty-six million, seventy-five thousand, four hundred ninety-nine".