660164587 has 8 divisors (see below), whose sum is σ = 699271056. Its totient is φ = 621088512.

The previous prime is 660164581. The next prime is 660164591. The reversal of 660164587 is 785461066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 660164587 - 2⁷ = 660164459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660164581) 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 7 ways as a sum of consecutive naturals, for example, 49408 + ... + 61330.

It is an arithmetic number, because the mean of its divisors is an integer number (87408882).

Almost surely, 2^660164587 is an apocalyptic number.

660164587 is a deficient number, since it is larger than the sum of its proper divisors (39106469).

660164587 is a wasteful number, since it uses less digits than its factorization.

660164587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15197.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 660164587 is about 25693.6682277950. The cubic root of 660164587 is about 870.7311363925.

The spelling of 660164587 in words is "six hundred sixty million, one hundred sixty-four thousand, five hundred eighty-seven".