660474 has 32 divisors (see below), whose sum is σ = 1495680. Its totient is φ = 218700.

The previous prime is 660449. The next prime is 660493. The reversal of 660474 is 474066.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is an unprimeable 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 15 ways as a sum of consecutive naturals, for example, 4299 + ... + 4449.

It is an arithmetic number, because the mean of its divisors is an integer number (46740).

2⁶⁶⁰⁴⁷⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747840).

660474 is an abundant number, since it is smaller than the sum of its proper divisors (835206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660474 is an equidigital number, since it uses as much as digits as its factorization.

660474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 660474 is about 812.6955149378. The cubic root of 660474 is about 87.0867149673.

The spelling of 660474 in words is "six hundred sixty thousand, four hundred seventy-four".