266328623 has 12 divisors (see below), whose sum is σ = 297548664. Its totient is φ = 238141200.

The previous prime is 266328619. The next prime is 266328653. The reversal of 266328623 is 326823662.

It is not a de Polignac number, because 266328623 - 2² = 266328619 is a prime.

It is a super-2 number, since 2×266328623² = 141861870858152258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266328653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10661 + ... + 25422.

It is an arithmetic number, because the mean of its divisors is an integer number (24795722).

Almost surely, 2^266328623 is an apocalyptic number.

266328623 is a deficient number, since it is larger than the sum of its proper divisors (31220041).

266328623 is a wasteful number, since it uses less digits than its factorization.

266328623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36166 (or 36155 counting only the distinct ones).

The product of its digits is 124416, while the sum is 38.

The square root of 266328623 is about 16319.5779050808. The cubic root of 266328623 is about 643.3874934194.

The spelling of 266328623 in words is "two hundred sixty-six million, three hundred twenty-eight thousand, six hundred twenty-three".