1266078495067 has 2 divisors, whose sum is σ = 1266078495068. Its totient is φ = 1266078495066.

The previous prime is 1266078495061. The next prime is 1266078495103. The reversal of 1266078495067 is 7605948706621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1266078495067 - 2¹⁹ = 1266077970779 is a prime.

It is a super-2 number, since 2×1266078495067² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1266078494996 and 1266078495014.

It is not a weakly prime, because it can be changed into another prime (1266078495061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633039247533 + 633039247534.

It is an arithmetic number, because the mean of its divisors is an integer number (633039247534).

Almost surely, 2^{1266078495067} is an apocalyptic number.

1266078495067 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266078495067 is an equidigital number, since it uses as much as digits as its factorization.

1266078495067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 1266078495067 in words is "one trillion, two hundred sixty-six billion, seventy-eight million, four hundred ninety-five thousand, sixty-seven".