1266672775 has 12 divisors (see below), whose sum is σ = 1571142744. Its totient is φ = 1013036000.

The previous prime is 1266672769. The next prime is 1266672779. The reversal of 1266672775 is 5772766621.

It is not a de Polignac number, because 1266672775 - 2⁹ = 1266672263 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 (1266672779) 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 in 11 ways as a sum of consecutive naturals, for example, 120480 + ... + 130570.

It is an arithmetic number, because the mean of its divisors is an integer number (130928562).

Almost surely, 2^1266672775 is an apocalyptic number.

1266672775 is a deficient number, since it is larger than the sum of its proper divisors (304469969).

1266672775 is a wasteful number, since it uses less digits than its factorization.

1266672775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15122 (or 15117 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 49.

The square root of 1266672775 is about 35590.3466546759. The cubic root of 1266672775 is about 1081.9855947620.

It can be divided in two parts, 1266 and 672775, that added together give a square (674041 = 821²).

The spelling of 1266672775 in words is "one billion, two hundred sixty-six million, six hundred seventy-two thousand, seven hundred seventy-five".