6660078 has 8 divisors (see below), whose sum is σ = 13320168. Its totient is φ = 2220024.

The previous prime is 6660061. The next prime is 6660091. The reversal of 6660078 is 8700666.

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

6660078 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555001 + ... + 555012.

It is an arithmetic number, because the mean of its divisors is an integer number (1665021).

Almost surely, 2^6660078 is an apocalyptic number.

6660078 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.

6660078 is a wasteful number, since it uses less digits than its factorization.

6660078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110018.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 6660078 is about 2580.7126922616. The cubic root of 6660078 is about 188.1451836124.

The spelling of 6660078 in words is "six million, six hundred sixty thousand, seventy-eight".