1266680807 has 4 divisors (see below), whose sum is σ = 1447635216. Its totient is φ = 1085726400.

The previous prime is 1266680759. The next prime is 1266680837. The reversal of 1266680807 is 7080866621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7080866621 = 53 ⋅133601257.

It is a cyclic number.

It is not a de Polignac number, because 1266680807 - 2¹² = 1266676711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266680837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90477194 + ... + 90477207.

It is an arithmetic number, because the mean of its divisors is an integer number (361908804).

Almost surely, 2^1266680807 is an apocalyptic number.

1266680807 is a deficient number, since it is larger than the sum of its proper divisors (180954409).

1266680807 is an equidigital number, since it uses as much as digits as its factorization.

1266680807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180954408.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 1266680807 is about 35590.4594940835. The cubic root of 1266680807 is about 1081.9878817220.

The spelling of 1266680807 in words is "one billion, two hundred sixty-six million, six hundred eighty thousand, eight hundred seven".