266542680 has 64 divisors (see below), whose sum is σ = 803144160. Its totient is φ = 70765568.

The previous prime is 266542669. The next prime is 266542723. The reversal of 266542680 is 86245662.

266542680 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 23194 + ... + 32726.

Almost surely, 2^266542680 is an apocalyptic number.

266542680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266542680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401572080).

266542680 is an abundant number, since it is smaller than the sum of its proper divisors (536601480).

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

266542680 is a wasteful number, since it uses less digits than its factorization.

266542680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9780 (or 9776 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 266542680 is about 16326.1348763264. The cubic root of 266542680 is about 643.5598177637.

The spelling of 266542680 in words is "two hundred sixty-six million, five hundred forty-two thousand, six hundred eighty".