266564650 has 48 divisors (see below), whose sum is σ = 555544800. Its totient is φ = 94305600.

The previous prime is 266564621. The next prime is 266564653. The reversal of 266564650 is 56465662.

It is not an unprimeable number, because it can be changed into a prime (266564653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13801 + ... + 26899.

It is an arithmetic number, because the mean of its divisors is an integer number (11573850).

Almost surely, 2^266564650 is an apocalyptic number.

266564650 is an abundant number, since it is smaller than the sum of its proper divisors (288980150).

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

266564650 is a wasteful number, since it uses less digits than its factorization.

266564650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13159 (or 13154 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 266564650 is about 16326.8077100210. The cubic root of 266564650 is about 643.5774992607.

The spelling of 266564650 in words is "two hundred sixty-six million, five hundred sixty-four thousand, six hundred fifty".