266395630 has 8 divisors (see below), whose sum is σ = 479512152. Its totient is φ = 106558248.

The previous prime is 266395517. The next prime is 266395631. The reversal of 266395630 is 36593662.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266395631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13319772 + ... + 13319791.

It is an arithmetic number, because the mean of its divisors is an integer number (59939019).

Almost surely, 2^266395630 is an apocalyptic number.

266395630 is a deficient number, since it is larger than the sum of its proper divisors (213116522).

266395630 is a wasteful number, since it uses less digits than its factorization.

266395630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26639570.

The product of its (nonzero) digits is 174960, while the sum is 40.

The square root of 266395630 is about 16321.6307396044. The cubic root of 266395630 is about 643.4414466273.

The spelling of 266395630 in words is "two hundred sixty-six million, three hundred ninety-five thousand, six hundred thirty".