266144434 has 4 divisors (see below), whose sum is σ = 399216654. Its totient is φ = 133072216.

The previous prime is 266144413. The next prime is 266144449. The reversal of 266144434 is 434441662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 261954225 + 4190209 = 16185^2 + 2047^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 266144434.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66536107 + ... + 66536110.

Almost surely, 2^266144434 is an apocalyptic number.

266144434 is a deficient number, since it is larger than the sum of its proper divisors (133072220).

266144434 is a wasteful number, since it uses less digits than its factorization.

266144434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133072219.

The product of its digits is 55296, while the sum is 34.

The square root of 266144434 is about 16313.9337377593. The cubic root of 266144434 is about 643.2391400719.

The spelling of 266144434 in words is "two hundred sixty-six million, one hundred forty-four thousand, four hundred thirty-four".