660017073 has 8 divisors (see below), whose sum is σ = 884194336. Its totient is φ = 437925600.

The previous prime is 660017069. The next prime is 660017081. The reversal of 660017073 is 370710066.

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

It is not a de Polignac number, because 660017073 - 2² = 660017069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 660017073.

It is not an unprimeable number, because it can be changed into a prime (660017023) 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, 520708 + ... + 521973.

It is an arithmetic number, because the mean of its divisors is an integer number (110524292).

Almost surely, 2^660017073 is an apocalyptic number.

It is an amenable number.

660017073 is a deficient number, since it is larger than the sum of its proper divisors (224177263).

660017073 is a wasteful number, since it uses less digits than its factorization.

660017073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042895.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 660017073 is about 25690.7974379932. The cubic root of 660017073 is about 870.6662765057. Note that the first 3 decimals are identical.

The spelling of 660017073 in words is "six hundred sixty million, seventeen thousand, seventy-three".