266120440 has 16 divisors (see below), whose sum is σ = 598771080. Its totient is φ = 106448160.

The previous prime is 266120429. The next prime is 266120447. The reversal of 266120440 is 44021662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266120447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3326466 + ... + 3326545.

Almost surely, 2^266120440 is an apocalyptic number.

266120440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266120440 is an abundant number, since it is smaller than the sum of its proper divisors (332650640).

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

266120440 is a wasteful number, since it uses less digits than its factorization.

266120440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6653022 (or 6653018 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 266120440 is about 16313.1983375425. The cubic root of 266120440 is about 643.2198092853.

The spelling of 266120440 in words is "two hundred sixty-six million, one hundred twenty thousand, four hundred forty".