6671989056 has 28 divisors (see below), whose sum is σ = 17652971552. Its totient is φ = 2223996288.

The previous prime is 6671989021. The next prime is 6671989057. The reversal of 6671989056 is 6509891766.

It is a happy number.

It is a super-2 number, since 2×6671989056² = 89030875926767542272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6671988987 and 6671989005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6671989057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17374780 + ... + 17375163.

Almost surely, 2^6671989056 is an apocalyptic number.

It is an amenable number.

6671989056 is an abundant number, since it is smaller than the sum of its proper divisors (10980982496).

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

6671989056 is a wasteful number, since it uses less digits than its factorization.

6671989056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34749958 (or 34749948 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 57.

The square root of 6671989056 is about 81682.2444353729. The cubic root of 6671989056 is about 1882.5727805458.

The spelling of 6671989056 in words is "six billion, six hundred seventy-one million, nine hundred eighty-nine thousand, fifty-six".