966640 has 40 divisors (see below), whose sum is σ = 2307888. Its totient is φ = 376320.

The previous prime is 966631. The next prime is 966653. The reversal of 966640 is 46669.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3300 + ... + 3580.

2⁹⁶⁶⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 966640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153944).

966640 is an abundant number, since it is smaller than the sum of its proper divisors (1341248).

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

966640 is a wasteful number, since it uses less digits than its factorization.

966640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 966640 is about 983.1785188866. The cubic root of 966640 is about 98.8754001624.

The spelling of 966640 in words is "nine hundred sixty-six thousand, six hundred forty".