266867747761 has 4 divisors (see below), whose sum is σ = 266888134000. Its totient is φ = 266847361524.

The previous prime is 266867747759. The next prime is 266867747767. The reversal of 266867747761 is 167747768662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 266867747761 - 2¹ = 266867747759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266867747767) 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, 10173471 + ... + 10199668.

It is an arithmetic number, because the mean of its divisors is an integer number (66722033500).

Almost surely, 2^266867747761 is an apocalyptic number.

It is an amenable number.

266867747761 is a deficient number, since it is larger than the sum of its proper divisors (20386239).

266867747761 is a wasteful number, since it uses less digits than its factorization.

266867747761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20386238.

The product of its digits is 199148544, while the sum is 67.

The spelling of 266867747761 in words is "two hundred sixty-six billion, eight hundred sixty-seven million, seven hundred forty-seven thousand, seven hundred sixty-one".