6667740 has 72 divisors (see below), whose sum is σ = 21425040. Its totient is φ = 1672704.

The previous prime is 6667729. The next prime is 6667741. The reversal of 6667740 is 477666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6667695 and 6667704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6667741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1971 + ... + 4149.

It is an arithmetic number, because the mean of its divisors is an integer number (297570).

Almost surely, 2^6667740 is an apocalyptic number.

6667740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6667740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10712520).

6667740 is an abundant number, since it is smaller than the sum of its proper divisors (14757300).

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

6667740 is a wasteful number, since it uses less digits than its factorization.

6667740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211 (or 2206 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 6667740 is about 2582.1967392126. The cubic root of 6667740 is about 188.2173056876.

The spelling of 6667740 in words is "six million, six hundred sixty-seven thousand, seven hundred forty".