1266668167 has 4 divisors (see below), whose sum is σ = 1321740720. Its totient is φ = 1211595616.

The previous prime is 1266668159. The next prime is 1266668191. The reversal of 1266668167 is 7618666621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1266668167 - 2³ = 1266668159 is a prime.

It is a super-2 number, since 2×1266668167² = 3208896490582279778, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1266668167.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266668267) 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 3 ways as a sum of consecutive naturals, for example, 27536242 + ... + 27536287.

It is an arithmetic number, because the mean of its divisors is an integer number (330435180).

Almost surely, 2^1266668167 is an apocalyptic number.

1266668167 is a deficient number, since it is larger than the sum of its proper divisors (55072553).

1266668167 is an equidigital number, since it uses as much as digits as its factorization.

1266668167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55072552.

The product of its digits is 870912, while the sum is 49.

The square root of 1266668167 is about 35590.2819179618. The cubic root of 1266668167 is about 1081.9842827168.

The spelling of 1266668167 in words is "one billion, two hundred sixty-six million, six hundred sixty-eight thousand, one hundred sixty-seven".