266555051 has 6 divisors (see below), whose sum is σ = 310074300. Its totient is φ = 228475716.

The previous prime is 266555021. The next prime is 266555057. The reversal of 266555051 is 150555662.

It is not a de Polignac number, because 266555051 - 2¹⁴ = 266538667 is a prime.

It is a super-2 number, since 2×266555051² = 142103190427225202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266555057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2719901 + ... + 2719998.

It is an arithmetic number, because the mean of its divisors is an integer number (51679050).

Almost surely, 2^266555051 is an apocalyptic number.

266555051 is a deficient number, since it is larger than the sum of its proper divisors (43519249).

266555051 is an equidigital number, since it uses as much as digits as its factorization.

266555051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5439913 (or 5439906 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 266555051 is about 16326.5137429887. The cubic root of 266555051 is about 643.5697740871.

The spelling of 266555051 in words is "two hundred sixty-six million, five hundred fifty-five thousand, fifty-one".