266661051 has 8 divisors (see below), whose sum is σ = 359213904. Its totient is φ = 175941120.

The previous prime is 266661049. The next prime is 266661077. The reversal of 266661051 is 150166662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 266661051 - 2¹ = 266661049 is a prime.

It is a super-2 number, since 2×266661051² = 142216232240849202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266665051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457890 + ... + 458471.

It is an arithmetic number, because the mean of its divisors is an integer number (44901738).

Almost surely, 2^266661051 is an apocalyptic number.

266661051 is a deficient number, since it is larger than the sum of its proper divisors (92552853).

266661051 is an equidigital number, since it uses as much as digits as its factorization.

266661051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916461.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 266661051 is about 16329.7596736755. The cubic root of 266661051 is about 643.6550714832.

The spelling of 266661051 in words is "two hundred sixty-six million, six hundred sixty-one thousand, fifty-one".