266942247139 has 4 divisors (see below), whose sum is σ = 268049891560. Its totient is φ = 265834602720.

The previous prime is 266942247133. The next prime is 266942247149. The reversal of 266942247139 is 931742249662.

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 266942247139 - 2³¹ = 264794763491 is a prime.

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 266942247139.

It is not an unprimeable number, because it can be changed into a prime (266942247133) 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, 553821849 + ... + 553822330.

It is an arithmetic number, because the mean of its divisors is an integer number (67012472890).

Almost surely, 2^266942247139 is an apocalyptic number.

266942247139 is a deficient number, since it is larger than the sum of its proper divisors (1107644421).

266942247139 is a wasteful number, since it uses less digits than its factorization.

266942247139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107644420.

The product of its digits is 7838208, while the sum is 55.

The spelling of 266942247139 in words is "two hundred sixty-six billion, nine hundred forty-two million, two hundred forty-seven thousand, one hundred thirty-nine".