266764680 has 384 divisors, whose sum is σ = 1132185600. Its totient is φ = 52862976.

The previous prime is 266764639. The next prime is 266764681. The reversal of 266764680 is 86467662.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (266764681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 556681 + ... + 557159.

It is an arithmetic number, because the mean of its divisors is an integer number (2948400).

Almost surely, 2^266764680 is an apocalyptic number.

266764680 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 266764680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (566092800).

266764680 is an abundant number, since it is smaller than the sum of its proper divisors (865420920).

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

266764680 is a wasteful number, since it uses less digits than its factorization.

266764680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 266764680 is about 16332.9323760309. The cubic root of 266764680 is about 643.7384391049.

The spelling of 266764680 in words is "two hundred sixty-six million, seven hundred sixty-four thousand, six hundred eighty".