266881967 has 4 divisors (see below), whose sum is σ = 291143976. Its totient is φ = 242619960.

The previous prime is 266881943. The next prime is 266881969. The reversal of 266881967 is 769188662.

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

It is a de Polignac number, because none of the positive numbers 2^k-266881967 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 (266881969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12130988 + ... + 12131009.

It is an arithmetic number, because the mean of its divisors is an integer number (72785994).

Almost surely, 2^266881967 is an apocalyptic number.

266881967 is a deficient number, since it is larger than the sum of its proper divisors (24262009).

266881967 is a wasteful number, since it uses less digits than its factorization.

266881967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24262008.

The product of its digits is 1741824, while the sum is 53.

The square root of 266881967 is about 16336.5224879715. The cubic root of 266881967 is about 643.8327682940.

The spelling of 266881967 in words is "two hundred sixty-six million, eight hundred eighty-one thousand, nine hundred sixty-seven".