1266667379 has 8 divisors (see below), whose sum is σ = 1287997920. Its totient is φ = 1245355200.

The previous prime is 1266667289. The next prime is 1266667411. The reversal of 1266667379 is 9737666621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266667379 - 2⁸ = 1266667123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1266667379.

It is not an unprimeable number, because it can be changed into a prime (1266667579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265487 + ... + 270215.

It is an arithmetic number, because the mean of its divisors is an integer number (160999740).

Almost surely, 2^1266667379 is an apocalyptic number.

1266667379 is a deficient number, since it is larger than the sum of its proper divisors (21330541).

1266667379 is an equidigital number, since it uses as much as digits as its factorization.

1266667379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9181.

The product of its digits is 3429216, while the sum is 53.

The square root of 1266667379 is about 35590.2708475224. The cubic root of 1266667379 is about 1081.9840583477.

The spelling of 1266667379 in words is "one billion, two hundred sixty-six million, six hundred sixty-seven thousand, three hundred seventy-nine".