660704 has 24 divisors (see below), whose sum is σ = 1419768. Its totient is φ = 300160.

The previous prime is 660683. The next prime is 660719. The reversal of 660704 is 407066.

660704 = T₁₈₇ + T₁₈₈ + ... + T₂₁₈.

It is a self number, because there is not a number n which added to its sum of digits gives 660704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587 + ... + 1290.

It is an arithmetic number, because the mean of its divisors is an integer number (59157).

2⁶⁶⁰⁷⁰⁴ is an apocalyptic number.

It is an amenable number.

660704 is an abundant number, since it is smaller than the sum of its proper divisors (759064).

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

660704 is a wasteful number, since it uses less digits than its factorization.

660704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898 (or 1890 counting only the distinct ones).

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

The square root of 660704 is about 812.8370070315. The cubic root of 660704 is about 87.0968226676.

The spelling of 660704 in words is "six hundred sixty thousand, seven hundred four".