266156047 has 4 divisors (see below), whose sum is σ = 280164280. Its totient is φ = 252147816.

The previous prime is 266156041. The next prime is 266156057. The reversal of 266156047 is 740651662.

It is a happy number.

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 266156047 - 2¹⁵ = 266123279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266155997 and 266156015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266156041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7004088 + ... + 7004125.

It is an arithmetic number, because the mean of its divisors is an integer number (70041070).

Almost surely, 2^266156047 is an apocalyptic number.

266156047 is a deficient number, since it is larger than the sum of its proper divisors (14008233).

266156047 is a wasteful number, since it uses less digits than its factorization.

266156047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14008232.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 266156047 is about 16314.2896566170. The cubic root of 266156047 is about 643.2484956780.

The spelling of 266156047 in words is "two hundred sixty-six million, one hundred fifty-six thousand, forty-seven".