266216730 has 32 divisors (see below), whose sum is σ = 688068864. Its totient is φ = 65530176.

The previous prime is 266216693. The next prime is 266216761. The reversal of 266216730 is 37612662.

It is a junction number, because it is equal to n+sod(n) for n = 266216691 and 266216700.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340914 + ... + 341693.

It is an arithmetic number, because the mean of its divisors is an integer number (21502152).

Almost surely, 2^266216730 is an apocalyptic number.

266216730 is an abundant number, since it is smaller than the sum of its proper divisors (421852134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266216730 is a wasteful number, since it uses less digits than its factorization.

266216730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682630.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 266216730 is about 16316.1493619052. The cubic root of 266216730 is about 643.2973783826.

The spelling of 266216730 in words is "two hundred sixty-six million, two hundred sixteen thousand, seven hundred thirty".