6613651988 has 12 divisors (see below), whose sum is σ = 11736904032. Its totient is φ = 3260250840.

The previous prime is 6613651949. The next prime is 6613652027. The reversal of 6613651988 is 8891563166.

It is an interprime number because it is at equal distance from previous prime (6613651949) and next prime (6613652027).

It is a congruent number.

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, 11643470 + ... + 11644037.

It is an arithmetic number, because the mean of its divisors is an integer number (978075336).

Almost surely, 2^6613651988 is an apocalyptic number.

It is an amenable number.

6613651988 is a deficient number, since it is larger than the sum of its proper divisors (5123252044).

6613651988 is a wasteful number, since it uses less digits than its factorization.

6613651988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23287582 (or 23287580 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 53.

The square root of 6613651988 is about 81324.3628195143. The cubic root of 6613651988 is about 1877.0699025861.

The spelling of 6613651988 in words is "six billion, six hundred thirteen million, six hundred fifty-one thousand, nine hundred eighty-eight".