266016621 has 16 divisors (see below), whose sum is σ = 386812160. Its totient is φ = 161628480.

The previous prime is 266016589. The next prime is 266016631. The reversal of 266016621 is 126610662.

It is not a de Polignac number, because 266016621 - 2⁵ = 266016589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266016631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40090 + ... + 46251.

It is an arithmetic number, because the mean of its divisors is an integer number (24175760).

Almost surely, 2^266016621 is an apocalyptic number.

It is an amenable number.

266016621 is a deficient number, since it is larger than the sum of its proper divisors (120795539).

266016621 is a wasteful number, since it uses less digits than its factorization.

266016621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86436.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 266016621 is about 16310.0159717886. The cubic root of 266016621 is about 643.1361540261.

The spelling of 266016621 in words is "two hundred sixty-six million, sixteen thousand, six hundred twenty-one".