266261206 has 4 divisors (see below), whose sum is σ = 399391812. Its totient is φ = 133130602.

The previous prime is 266261197. The next prime is 266261207. The reversal of 266261206 is 602162662.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266261207) by changing a digit.

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, 66565300 + ... + 66565303.

It is an arithmetic number, because the mean of its divisors is an integer number (99847953).

Almost surely, 2^266261206 is an apocalyptic number.

266261206 is a deficient number, since it is larger than the sum of its proper divisors (133130606).

266261206 is a wasteful number, since it uses less digits than its factorization.

266261206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133130605.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 266261206 is about 16317.5122491144. The cubic root of 266261206 is about 643.3332009509. Note that the first 3 decimals are identical.

The spelling of 266261206 in words is "two hundred sixty-six million, two hundred sixty-one thousand, two hundred six".