663167863609 has 2 divisors, whose sum is σ = 663167863610. Its totient is φ = 663167863608.

The previous prime is 663167863531. The next prime is 663167863613. The reversal of 663167863609 is 906368761366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 660973878009 + 2193985600 = 813003^2 + 46840^2 .

It is a cyclic number.

It is not a de Polignac number, because 663167863609 - 2⁷ = 663167863481 is a prime.

It is not a weakly prime, because it can be changed into another prime (663167863639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331583931804 + 331583931805.

It is an arithmetic number, because the mean of its divisors is an integer number (331583931805).

Almost surely, 2^663167863609 is an apocalyptic number.

It is an amenable number.

663167863609 is a deficient number, since it is larger than the sum of its proper divisors (1).

663167863609 is an equidigital number, since it uses as much as digits as its factorization.

663167863609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35271936, while the sum is 61.

The spelling of 663167863609 in words is "six hundred sixty-three billion, one hundred sixty-seven million, eight hundred sixty-three thousand, six hundred nine".