660672 has 84 divisors (see below), whose sum is σ = 2007616. Its totient is φ = 207360.

The previous prime is 660661. The next prime is 660683. The reversal of 660672 is 276066.

It is an interprime number because it is at equal distance from previous prime (660661) and next prime (660683).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17838 + ... + 17874.

2⁶⁶⁰⁶⁷² is an apocalyptic number.

660672 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003808).

660672 is an abundant number, since it is smaller than the sum of its proper divisors (1346944).

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

660672 is a wasteful number, since it uses less digits than its factorization.

660672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 660672 is about 812.8173226501. The cubic root of 660672 is about 87.0954165194.

The spelling of 660672 in words is "six hundred sixty thousand, six hundred seventy-two".