6667780 has 48 divisors (see below), whose sum is σ = 16200576. Its totient is φ = 2257920.

The previous prime is 6667753. The next prime is 6667781. The reversal of 6667780 is 877666.

It is a d-powerful number, because it can be written as 6 + 6 + 6⁶ + 7⁷ + 7⁸ + 8⁵ + 0 .

It is not an unprimeable number, because it can be changed into a prime (6667781) 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 15 ways as a sum of consecutive naturals, for example, 13335 + ... + 13825.

It is an arithmetic number, because the mean of its divisors is an integer number (337512).

Almost surely, 2^6667780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6667780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8100288).

6667780 is an abundant number, since it is smaller than the sum of its proper divisors (9532796).

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

6667780 is a wasteful number, since it uses less digits than its factorization.

6667780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 6667780 is about 2582.2044845442. The cubic root of 6667780 is about 188.2176820608.

It can be divided in two parts, 6667 and 780, that added together give a palindrome (7447).

The spelling of 6667780 in words is "six million, six hundred sixty-seven thousand, seven hundred eighty".