666113587 has 4 divisors (see below), whose sum is σ = 666407896. Its totient is φ = 665819280.

The previous prime is 666113579. The next prime is 666113621. The reversal of 666113587 is 785311666.

666113587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 666113587 - 2³ = 666113579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666183587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143733 + ... + 148294.

It is an arithmetic number, because the mean of its divisors is an integer number (166601974).

Almost surely, 2^666113587 is an apocalyptic number.

666113587 is a deficient number, since it is larger than the sum of its proper divisors (294309).

666113587 is a wasteful number, since it uses less digits than its factorization.

666113587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294308.

The product of its digits is 181440, while the sum is 43.

The square root of 666113587 is about 25809.1764107265. The cubic root of 666113587 is about 873.3388181029.

The spelling of 666113587 in words is "six hundred sixty-six million, one hundred thirteen thousand, five hundred eighty-seven".