666462501667 has 2 divisors, whose sum is σ = 666462501668. Its totient is φ = 666462501666.

The previous prime is 666462501643. The next prime is 666462501671. The reversal of 666462501667 is 766105264666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 666462501667 - 2⁷ = 666462501539 is a prime.

It is a super-2 number, since 2×666462501667² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666462508667) 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, 333231250833 + 333231250834.

It is an arithmetic number, because the mean of its divisors is an integer number (333231250834).

Almost surely, 2^666462501667 is an apocalyptic number.

666462501667 is a deficient number, since it is larger than the sum of its proper divisors (1).

666462501667 is an equidigital number, since it uses as much as digits as its factorization.

666462501667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 666462501667 in words is "six hundred sixty-six billion, four hundred sixty-two million, five hundred one thousand, six hundred sixty-seven".