266003987 has 8 divisors (see below), whose sum is σ = 267878304. Its totient is φ = 264135168.

The previous prime is 266003957. The next prime is 266003999. The reversal of 266003987 is 789300662.

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

It is not a de Polignac number, because 266003987 - 2¹⁸ = 265741843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266003917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148298 + ... + 150080.

It is an arithmetic number, because the mean of its divisors is an integer number (33484788).

Almost surely, 2^266003987 is an apocalyptic number.

266003987 is a deficient number, since it is larger than the sum of its proper divisors (1874317).

266003987 is a wasteful number, since it uses less digits than its factorization.

266003987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 266003987 is about 16309.6286591694. The cubic root of 266003987 is about 643.1259723179.

The spelling of 266003987 in words is "two hundred sixty-six million, three thousand, nine hundred eighty-seven".