660378 has 8 divisors (see below), whose sum is σ = 1320768. Its totient is φ = 220124.

The previous prime is 660377. The next prime is 660379. The reversal of 660378 is 873066.

It is an interprime number because it is at equal distance from previous prime (660377) and next prime (660379).

It is a sphenic number, since it is the product of 3 distinct primes.

660378 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (660377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55026 + ... + 55037.

It is an arithmetic number, because the mean of its divisors is an integer number (165096).

2⁶⁶⁰³⁷⁸ is an apocalyptic number.

660378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

660378 is a wasteful number, since it uses less digits than its factorization.

660378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110068.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 660378 is about 812.6364500808. The cubic root of 660378 is about 87.0824954069.

The spelling of 660378 in words is "six hundred sixty thousand, three hundred seventy-eight".