6658377668 has 12 divisors (see below), whose sum is σ = 11680653180. Its totient is φ = 3321048192.

The previous prime is 6658377659. The next prime is 6658377683. The reversal of 6658377668 is 8667738566.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3272068804 + 3386308864 = 57202^2 + 58192^2 .

It is a super-2 number, since 2×6658377668² = 88667986339442236448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6658377668.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033321 + ... + 2036592.

It is an arithmetic number, because the mean of its divisors is an integer number (973387765).

Almost surely, 2^6658377668 is an apocalyptic number.

It is an amenable number.

6658377668 is a deficient number, since it is larger than the sum of its proper divisors (5022275512).

6658377668 is a wasteful number, since it uses less digits than its factorization.

6658377668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070326 (or 4070324 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 62.

The square root of 6658377668 is about 81598.8827619594. The cubic root of 6658377668 is about 1881.2917096185.

The spelling of 6658377668 in words is "six billion, six hundred fifty-eight million, three hundred seventy-seven thousand, six hundred sixty-eight".