266660087 has 4 divisors (see below), whose sum is σ = 266704656. Its totient is φ = 266615520.

The previous prime is 266660077. The next prime is 266660101. The reversal of 266660087 is 780066662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 266660087 - 2⁸ = 266659831 is a prime.

It is a super-2 number, since 2×266660087² = 142215203997695138, 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 (266660027) 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 3 ways as a sum of consecutive naturals, for example, 11603 + ... + 25844.

It is an arithmetic number, because the mean of its divisors is an integer number (66676164).

Almost surely, 2^266660087 is an apocalyptic number.

266660087 is a deficient number, since it is larger than the sum of its proper divisors (44569).

266660087 is an equidigital number, since it uses as much as digits as its factorization.

266660087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44568.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 266660087 is about 16329.7301569867. The cubic root of 266660087 is about 643.6542958616.

The spelling of 266660087 in words is "two hundred sixty-six million, six hundred sixty thousand, eighty-seven".