266820787151 has 4 divisors (see below), whose sum is σ = 266831784072. Its totient is φ = 266809790232.

The previous prime is 266820787141. The next prime is 266820787159. The reversal of 266820787151 is 151787028662.

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 266820787151 - 2⁶ = 266820787087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266820787093 and 266820787102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266820787159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5461985 + ... + 5510618.

It is an arithmetic number, because the mean of its divisors is an integer number (66707946018).

Almost surely, 2^266820787151 is an apocalyptic number.

266820787151 is a deficient number, since it is larger than the sum of its proper divisors (10996921).

266820787151 is a wasteful number, since it uses less digits than its factorization.

266820787151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10996920.

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 266820787151 in words is "two hundred sixty-six billion, eight hundred twenty million, seven hundred eighty-seven thousand, one hundred fifty-one".