6746665940 has 72 divisors (see below), whose sum is σ = 16530014592. Its totient is φ = 2313027360.

The previous prime is 6746665931. The next prime is 6746665943. The reversal of 6746665940 is 495666476.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6746665943) 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, 326105 + ... + 346175.

It is an arithmetic number, because the mean of its divisors is an integer number (229583536).

Almost surely, 2^6746665940 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 6746665940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8265007296).

6746665940 is an abundant number, since it is smaller than the sum of its proper divisors (9783348652).

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

6746665940 is an equidigital number, since it uses as much as digits as its factorization.

6746665940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20115 (or 20085 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 53.

The square root of 6746665940 is about 82138.0906766160. The cubic root of 6746665940 is about 1889.5703641622.

The spelling of 6746665940 in words is "six billion, seven hundred forty-six million, six hundred sixty-five thousand, nine hundred forty".