660064 has 12 divisors (see below), whose sum is σ = 1299564. Its totient is φ = 330016.

The previous prime is 660061. The next prime is 660067. The reversal of 660064 is 460066.

It is an interprime number because it is at equal distance from previous prime (660061) and next prime (660067).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10282 + ... + 10345.

It is an arithmetic number, because the mean of its divisors is an integer number (108297).

2⁶⁶⁰⁰⁶⁴ is an apocalyptic number.

It is an amenable number.

660064 is a deficient number, since it is larger than the sum of its proper divisors (639500).

660064 is a wasteful number, since it uses less digits than its factorization.

660064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20637 (or 20629 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 660064 is about 812.4432287859. The cubic root of 660064 is about 87.0686910713.

The spelling of 660064 in words is "six hundred sixty thousand, sixty-four".