6676354640 has 80 divisors (see below), whose sum is σ = 15703050000. Its totient is φ = 2639609856.

The previous prime is 6676354637. The next prime is 6676354673. The reversal of 6676354640 is 464536766.

It can be written as a sum of positive squares in 8 ways, for example, as 916151824 + 5760202816 = 30268^2 + 75896^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×6676354640² = 89147422558099059200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5344736 + ... + 5345984.

It is an arithmetic number, because the mean of its divisors is an integer number (196288125).

Almost surely, 2^6676354640 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 6676354640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7851525000).

6676354640 is an abundant number, since it is smaller than the sum of its proper divisors (9026695360).

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

6676354640 is a wasteful number, since it uses less digits than its factorization.

6676354640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984 (or 1978 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 47.

The square root of 6676354640 is about 81708.9630334396. The cubic root of 6676354640 is about 1882.9832897003.

The spelling of 6676354640 in words is "six billion, six hundred seventy-six million, three hundred fifty-four thousand, six hundred forty".