266643251157 has 16 divisors (see below), whose sum is σ = 359035890048. Its totient is φ = 176009594880.

The previous prime is 266643251117. The next prime is 266643251177. The reversal of 266643251157 is 751152346662.

It is not a de Polignac number, because 266643251157 - 2⁶ = 266643251093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266643251117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66844 + ... + 733317.

It is an arithmetic number, because the mean of its divisors is an integer number (22439743128).

Almost surely, 2^266643251157 is an apocalyptic number.

It is an amenable number.

266643251157 is a deficient number, since it is larger than the sum of its proper divisors (92392638891).

266643251157 is a wasteful number, since it uses less digits than its factorization.

266643251157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801260.

The product of its digits is 1814400, while the sum is 48.

The spelling of 266643251157 in words is "two hundred sixty-six billion, six hundred forty-three million, two hundred fifty-one thousand, one hundred fifty-seven".