266601501 has 12 divisors (see below), whose sum is σ = 392357628. Its totient is φ = 174380544.

The previous prime is 266601473. The next prime is 266601527. The reversal of 266601501 is 105106662.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 89019225 + 177582276 = 9435^2 + 13326^2 .

It is not a de Polignac number, because 266601501 - 2¹⁴ = 266585117 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266601551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 278980 + ... + 279933.

It is an arithmetic number, because the mean of its divisors is an integer number (32696469).

Almost surely, 2^266601501 is an apocalyptic number.

It is an amenable number.

266601501 is a deficient number, since it is larger than the sum of its proper divisors (125756127).

266601501 is a wasteful number, since it uses less digits than its factorization.

266601501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558972 (or 558969 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 266601501 is about 16327.9362137412. The cubic root of 266601501 is about 643.6071548328.

The spelling of 266601501 in words is "two hundred sixty-six million, six hundred one thousand, five hundred one".