266623426 has 4 divisors (see below), whose sum is σ = 399935142. Its totient is φ = 133311712.

The previous prime is 266623421. The next prime is 266623439. The reversal of 266623426 is 624326662.

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., 214769025 + 51854401 = 14655^2 + 7201^2 .

It is not an unprimeable number, because it can be changed into a prime (266623421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66655855 + ... + 66655858.

Almost surely, 2^266623426 is an apocalyptic number.

266623426 is a deficient number, since it is larger than the sum of its proper divisors (133311716).

266623426 is a wasteful number, since it uses less digits than its factorization.

266623426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133311715.

The product of its digits is 124416, while the sum is 37.

The square root of 266623426 is about 16328.6075952605. The cubic root of 266623426 is about 643.6247975193.

The spelling of 266623426 in words is "two hundred sixty-six million, six hundred twenty-three thousand, four hundred twenty-six".