266272740 has 72 divisors (see below), whose sum is σ = 819786240. Its totient is φ = 69943104.

The previous prime is 266272711. The next prime is 266272753. The reversal of 266272740 is 47272662.

266272740 is a `hidden beast` number, since 2 + 6 + 627 + 27 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 266272695 and 266272704.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1021 + ... + 23099.

It is an arithmetic number, because the mean of its divisors is an integer number (11385920).

Almost surely, 2^266272740 is an apocalyptic number.

266272740 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 266272740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409893120).

266272740 is an abundant number, since it is smaller than the sum of its proper divisors (553513500).

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

266272740 is a wasteful number, since it uses less digits than its factorization.

266272740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22161 (or 22156 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 266272740 is about 16317.8656692596. The cubic root of 266272740 is about 643.3424901975.

The spelling of 266272740 in words is "two hundred sixty-six million, two hundred seventy-two thousand, seven hundred forty".