666480071 has 2 divisors, whose sum is σ = 666480072. Its totient is φ = 666480070.

The previous prime is 666480037. The next prime is 666480077. The reversal of 666480071 is 170084666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666480071 - 2¹⁴ = 666463687 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666480077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333240035 + 333240036.

It is an arithmetic number, because the mean of its divisors is an integer number (333240036).

Almost surely, 2^666480071 is an apocalyptic number.

666480071 is a deficient number, since it is larger than the sum of its proper divisors (1).

666480071 is an equidigital number, since it uses as much as digits as its factorization.

666480071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 666480071 is about 25816.2753122909. The cubic root of 666480071 is about 873.4989539664.

The spelling of 666480071 in words is "six hundred sixty-six million, four hundred eighty thousand, seventy-one".