660676089 has 8 divisors (see below), whose sum is σ = 882587872. Its totient is φ = 439607520.

The previous prime is 660676069. The next prime is 660676097. The reversal of 660676089 is 980676066.

It is a happy number.

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

It is not a de Polignac number, because 660676089 - 2⁹ = 660675577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660676019) 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, 208972 + ... + 212109.

It is an arithmetic number, because the mean of its divisors is an integer number (110323484).

Almost surely, 2^660676089 is an apocalyptic number.

It is an amenable number.

660676089 is a deficient number, since it is larger than the sum of its proper divisors (221911783).

660676089 is a wasteful number, since it uses less digits than its factorization.

660676089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421607.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 660676089 is about 25703.6201535893. The cubic root of 660676089 is about 870.9559620130.

The spelling of 660676089 in words is "six hundred sixty million, six hundred seventy-six thousand, eighty-nine".