266632720 has 40 divisors (see below), whose sum is σ = 620757144. Its totient is φ = 106509312.

The previous prime is 266632711. The next prime is 266632733. The reversal of 266632720 is 27236662.

It can be written as a sum of positive squares in 4 ways, for example, as 7551504 + 259081216 = 2748^2 + 16096^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 73182 + ... + 76738.

Almost surely, 2^266632720 is an apocalyptic number.

266632720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266632720 is an abundant number, since it is smaller than the sum of its proper divisors (354124424).

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

266632720 is a wasteful number, since it uses less digits than its factorization.

266632720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4507 (or 4501 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 266632720 is about 16328.8921853260. The cubic root of 266632720 is about 643.6322759561.

The spelling of 266632720 in words is "two hundred sixty-six million, six hundred thirty-two thousand, seven hundred twenty".