266242551 has 8 divisors (see below), whose sum is σ = 355943280. Its totient is φ = 177018432.

The previous prime is 266242547. The next prime is 266242567. The reversal of 266242551 is 155242662.

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

It is not a de Polignac number, because 266242551 - 2² = 266242547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266242531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117846 + ... + 120083.

It is an arithmetic number, because the mean of its divisors is an integer number (44492910).

Almost surely, 2^266242551 is an apocalyptic number.

266242551 is a deficient number, since it is larger than the sum of its proper divisors (89700729).

266242551 is a wasteful number, since it uses less digits than its factorization.

266242551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238305.

The product of its digits is 28800, while the sum is 33.

The square root of 266242551 is about 16316.9406139754. The cubic root of 266242551 is about 643.3181760294.

The spelling of 266242551 in words is "two hundred sixty-six million, two hundred forty-two thousand, five hundred fifty-one".