266227740 has 72 divisors (see below), whose sum is σ = 824765760. Its totient is φ = 69481344.

The previous prime is 266227727. The next prime is 266227751. The reversal of 266227740 is 47722662.

266227740 is a `hidden beast` number, since 26 + 622 + 7 + 7 + 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 = 266227695 and 266227704.

It is a congruent number.

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, 7275 + ... + 24194.

It is an arithmetic number, because the mean of its divisors is an integer number (11455080).

Almost surely, 2^266227740 is an apocalyptic number.

266227740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266227740 is an abundant number, since it is smaller than the sum of its proper divisors (558538020).

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

266227740 is a wasteful number, since it uses less digits than its factorization.

266227740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31531 (or 31526 counting only the distinct ones).

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

The square root of 266227740 is about 16316.4867542005. The cubic root of 266227740 is about 643.3062466037.

The spelling of 266227740 in words is "two hundred sixty-six million, two hundred twenty-seven thousand, seven hundred forty".