660760447 has 8 divisors (see below), whose sum is σ = 688076640. Its totient is φ = 633746400.

The previous prime is 660760391. The next prime is 660760519. The reversal of 660760447 is 744067066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-660760447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660760147) 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, 71068 + ... + 79825.

It is an arithmetic number, because the mean of its divisors is an integer number (86009580).

Almost surely, 2^660760447 is an apocalyptic number.

660760447 is a deficient number, since it is larger than the sum of its proper divisors (27316193).

660760447 is a wasteful number, since it uses less digits than its factorization.

660760447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151073.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 660760447 is about 25705.2610762855. The cubic root of 660760447 is about 870.9930295854.

The spelling of 660760447 in words is "six hundred sixty million, seven hundred sixty thousand, four hundred forty-seven".