266513520 has 160 divisors (see below), whose sum is σ = 1016934912. Its totient is φ = 56226816.

The previous prime is 266513497. The next prime is 266513563. The reversal of 266513520 is 25315662.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15739 + ... + 27941.

Almost surely, 2^266513520 is an apocalyptic number.

266513520 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 266513520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508467456).

266513520 is an abundant number, since it is smaller than the sum of its proper divisors (750421392).

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

266513520 is a wasteful number, since it uses less digits than its factorization.

266513520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12239 (or 12233 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 266513520 is about 16325.2418052536. The cubic root of 266513520 is about 643.5363482407.

The spelling of 266513520 in words is "two hundred sixty-six million, five hundred thirteen thousand, five hundred twenty".