266575920 has 160 divisors (see below), whose sum is σ = 911108352. Its totient is φ = 64060416.

The previous prime is 266575901. The next prime is 266575943. The reversal of 266575920 is 29575662.

It is a super-2 number, since 2×266575920² = 142125442247692800, which contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 133167 + ... + 135153.

Almost surely, 2^266575920 is an apocalyptic number.

266575920 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 266575920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455554176).

266575920 is an abundant number, since it is smaller than the sum of its proper divisors (644532432).

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

266575920 is a wasteful number, since it uses less digits than its factorization.

266575920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059 (or 2053 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 266575920 is about 16327.1528442653. The cubic root of 266575920 is about 643.5865690007.

The spelling of 266575920 in words is "two hundred sixty-six million, five hundred seventy-five thousand, nine hundred twenty".