6653781416 has 16 divisors (see below), whose sum is σ = 12476848500. Its totient is φ = 3326621824.

The previous prime is 6653781383. The next prime is 6653781451. The reversal of 6653781416 is 6141873566.

It can be written as a sum of positive squares in 2 ways, for example, as 6519916516 + 133864900 = 80746^2 + 11570^2 .

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, 105356 + ... + 156228.

Almost surely, 2^6653781416 is an apocalyptic number.

It is an amenable number.

6653781416 is a deficient number, since it is larger than the sum of its proper divisors (5823067084).

6653781416 is a wasteful number, since it uses less digits than its factorization.

6653781416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67228 (or 67224 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The square root of 6653781416 is about 81570.7142055284. The cubic root of 6653781416 is about 1880.8587272107.

The spelling of 6653781416 in words is "six billion, six hundred fifty-three million, seven hundred eighty-one thousand, four hundred sixteen".