6660788 has 6 divisors (see below), whose sum is σ = 11656386. Its totient is φ = 3330392.

The previous prime is 6660781. The next prime is 6660791. The reversal of 6660788 is 8870666.

It can be written as a sum of positive squares in only one way, i.e., 6360484 + 300304 = 2522^2 + 548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832595 + ... + 832602.

It is an arithmetic number, because the mean of its divisors is an integer number (1942731).

Almost surely, 2^6660788 is an apocalyptic number.

It is an amenable number.

6660788 is a deficient number, since it is larger than the sum of its proper divisors (4995598).

6660788 is a wasteful number, since it uses less digits than its factorization.

6660788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665201 (or 1665199 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 6660788 is about 2580.8502474960. The cubic root of 6660788 is about 188.1518691364.

The spelling of 6660788 in words is "six million, six hundred sixty thousand, seven hundred eighty-eight".