6660378 has 12 divisors (see below), whose sum is σ = 14430858. Its totient is φ = 2220120.

The previous prime is 6660377. The next prime is 6660389. The reversal of 6660378 is 8730666.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6365529 + 294849 = 2523^2 + 543^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6660371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 184993 + ... + 185028.

Almost surely, 2^6660378 is an apocalyptic number.

6660378 is an abundant number, since it is smaller than the sum of its proper divisors (7770480).

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

6660378 is a wasteful number, since it uses less digits than its factorization.

6660378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370029 (or 370026 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 6660378 is about 2580.7708150861. The cubic root of 6660378 is about 188.1480085396.

The spelling of 6660378 in words is "six million, six hundred sixty thousand, three hundred seventy-eight".