266901680 has 20 divisors (see below), whose sum is σ = 620546592. Its totient is φ = 106760640.

The previous prime is 266901671. The next prime is 266901749. The reversal of 266901680 is 86109662.

266901680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1668056 + ... + 1668215.

Almost surely, 2^266901680 is an apocalyptic number.

266901680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266901680 is an abundant number, since it is smaller than the sum of its proper divisors (353644912).

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

266901680 is a wasteful number, since it uses less digits than its factorization.

266901680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3336284 (or 3336278 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 266901680 is about 16337.1258182093. The cubic root of 266901680 is about 643.8486199493.

The spelling of 266901680 in words is "two hundred sixty-six million, nine hundred one thousand, six hundred eighty".