266650129 has 4 divisors (see below), whose sum is σ = 272323584. Its totient is φ = 260976676.

The previous prime is 266650121. The next prime is 266650133. The reversal of 266650129 is 921056662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 921056662 = 2 ⋅460528331.

It is a cyclic number.

It is not a de Polignac number, because 266650129 - 2³ = 266650121 is a prime.

It is a super-2 number, since 2×266650129² = 142204582591433282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266650121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2836657 + ... + 2836750.

It is an arithmetic number, because the mean of its divisors is an integer number (68080896).

Almost surely, 2^266650129 is an apocalyptic number.

It is an amenable number.

266650129 is a deficient number, since it is larger than the sum of its proper divisors (5673455).

266650129 is an equidigital number, since it uses as much as digits as its factorization.

266650129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5673454.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 266650129 is about 16329.4252501428. The cubic root of 266650129 is about 643.6462836773.

The spelling of 266650129 in words is "two hundred sixty-six million, six hundred fifty thousand, one hundred twenty-nine".