6664780 has 24 divisors (see below), whose sum is σ = 14479920. Its totient is φ = 2573760.

The previous prime is 6664771. The next prime is 6664787. The reversal of 6664780 is 874666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664787) 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 in 7 ways as a sum of consecutive naturals, for example, 5166 + ... + 6325.

It is an arithmetic number, because the mean of its divisors is an integer number (603330).

Almost surely, 2^6664780 is an apocalyptic number.

It is an amenable number.

6664780 is an abundant number, since it is smaller than the sum of its proper divisors (7815140).

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

6664780 is a wasteful number, since it uses less digits than its factorization.

6664780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11529 (or 11527 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 6664780 is about 2581.6235201903. The cubic root of 6664780 is about 188.1894498881.

It can be divided in two parts, 66 and 64780, that added together give a palindrome (64846).

The spelling of 6664780 in words is "six million, six hundred sixty-four thousand, seven hundred eighty".