266465220 has 48 divisors (see below), whose sum is σ = 852690048. Its totient is φ = 60906240.

The previous prime is 266465219. The next prime is 266465239. The reversal of 266465220 is 22564662.

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, 316801 + ... + 317640.

It is an arithmetic number, because the mean of its divisors is an integer number (17764376).

Almost surely, 2^266465220 is an apocalyptic number.

266465220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266465220 is an abundant number, since it is smaller than the sum of its proper divisors (586224828).

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

266465220 is a wasteful number, since it uses less digits than its factorization.

266465220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634460 (or 634458 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 266465220 is about 16323.7624339489. The cubic root of 266465220 is about 643.4974700586.

The spelling of 266465220 in words is "two hundred sixty-six million, four hundred sixty-five thousand, two hundred twenty".