1266420163 has 2 divisors, whose sum is σ = 1266420164. Its totient is φ = 1266420162.

The previous prime is 1266420157. The next prime is 1266420173. The reversal of 1266420163 is 3610246621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1266420163 - 2²⁵ = 1232865731 is a prime.

It is a super-3 number, since 3×1266420163³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1266420173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633210081 + 633210082.

It is an arithmetic number, because the mean of its divisors is an integer number (633210082).

Almost surely, 2^1266420163 is an apocalyptic number.

1266420163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266420163 is an equidigital number, since it uses as much as digits as its factorization.

1266420163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 1266420163 is about 35586.7975940516. The cubic root of 1266420163 is about 1081.9136633413.

Adding to 1266420163 its reverse (3610246621), we get a palindrome (4876666784).

The spelling of 1266420163 in words is "one billion, two hundred sixty-six million, four hundred twenty thousand, one hundred sixty-three".