266655040 has 56 divisors (see below), whose sum is σ = 649772640. Its totient is φ = 104176128.

The previous prime is 266654953. The next prime is 266655061. The reversal of 266655040 is 40556662.

266655040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×266655040² = 142209820714803200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266654987 and 266655005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4071 + ... + 23449.

Almost surely, 2^266655040 is an apocalyptic number.

266655040 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 266655040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324886320).

266655040 is an abundant number, since it is smaller than the sum of its proper divisors (383117600).

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

266655040 is a wasteful number, since it uses less digits than its factorization.

266655040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19439 (or 19429 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 266655040 is about 16329.5756221648. The cubic root of 266655040 is about 643.6502350818.

The spelling of 266655040 in words is "two hundred sixty-six million, six hundred fifty-five thousand, forty".