266407520 has 48 divisors (see below), whose sum is σ = 631765008. Its totient is φ = 106160640.

The previous prime is 266407501. The next prime is 266407529. The reversal of 266407520 is 25704662.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266407529) 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 7 ways as a sum of consecutive naturals, for example, 41315 + ... + 47325.

It is an arithmetic number, because the mean of its divisors is an integer number (13161771).

Almost surely, 2^266407520 is an apocalyptic number.

266407520 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 266407520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315882504).

266407520 is an abundant number, since it is smaller than the sum of its proper divisors (365357488).

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

266407520 is a wasteful number, since it uses less digits than its factorization.

266407520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6303 (or 6295 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 266407520 is about 16321.9949761051. The cubic root of 266407520 is about 643.4510193632.

The spelling of 266407520 in words is "two hundred sixty-six million, four hundred seven thousand, five hundred twenty".