266250038 has 4 divisors (see below), whose sum is σ = 399375060. Its totient is φ = 133125018.

The previous prime is 266249993. The next prime is 266250043. The reversal of 266250038 is 830052662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 830052662 = 2 ⋅415026331.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 266249986 and 266250013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66562508 + ... + 66562511.

It is an arithmetic number, because the mean of its divisors is an integer number (99843765).

Almost surely, 2^266250038 is an apocalyptic number.

266250038 is a deficient number, since it is larger than the sum of its proper divisors (133125022).

266250038 is a wasteful number, since it uses less digits than its factorization.

266250038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133125021.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 266250038 is about 16317.1700364984. The cubic root of 266250038 is about 643.3242062176.

The spelling of 266250038 in words is "two hundred sixty-six million, two hundred fifty thousand, thirty-eight".