266506451 has 4 divisors (see below), whose sum is σ = 278093712. Its totient is φ = 254919192.

The previous prime is 266506447. The next prime is 266506489. The reversal of 266506451 is 154605662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 266506451 - 2² = 266506447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266506441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5793596 + ... + 5793641.

It is an arithmetic number, because the mean of its divisors is an integer number (69523428).

Almost surely, 2^266506451 is an apocalyptic number.

266506451 is a deficient number, since it is larger than the sum of its proper divisors (11587261).

266506451 is a wasteful number, since it uses less digits than its factorization.

266506451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11587260.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 266506451 is about 16325.0252986021. The cubic root of 266506451 is about 643.5306584748.

The spelling of 266506451 in words is "two hundred sixty-six million, five hundred six thousand, four hundred fifty-one".