660470 has 8 divisors (see below), whose sum is σ = 1188864. Its totient is φ = 264184.

The previous prime is 660449. The next prime is 660493. The reversal of 660470 is 74066.

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

It is a congruent number.

It is an unprimeable number.

660470 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33014 + ... + 33033.

It is an arithmetic number, because the mean of its divisors is an integer number (148608).

2⁶⁶⁰⁴⁷⁰ is an apocalyptic number.

660470 is a deficient number, since it is larger than the sum of its proper divisors (528394).

660470 is a wasteful number, since it uses less digits than its factorization.

660470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66054.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 660470 is about 812.6930539878. The cubic root of 660470 is about 87.0865391604.

The spelling of 660470 in words is "six hundred sixty thousand, four hundred seventy".