266261516 has 24 divisors (see below), whose sum is σ = 491124480. Its totient is φ = 125958672.

The previous prime is 266261507. The next prime is 266261543. The reversal of 266261516 is 615162662.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71681 + ... + 75303.

It is an arithmetic number, because the mean of its divisors is an integer number (20463520).

Almost surely, 2^266261516 is an apocalyptic number.

It is an amenable number.

266261516 is a deficient number, since it is larger than the sum of its proper divisors (224862964).

266261516 is a wasteful number, since it uses less digits than its factorization.

266261516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4613 (or 4611 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 266261516 is about 16317.5217481087. The cubic root of 266261516 is about 643.3334506221. Note that the first 3 decimals are identical.

The spelling of 266261516 in words is "two hundred sixty-six million, two hundred sixty-one thousand, five hundred sixteen".