6358818661 has 12 divisors (see below), whose sum is σ = 7092249892. Its totient is φ = 5667266304.

The previous prime is 6358818637. The next prime is 6358818677. The reversal of 6358818661 is 1668188536.

It can be written as a sum of positive squares in 6 ways, for example, as 36978561 + 6321840100 = 6081^2 + 79510^2 .

It is not a de Polignac number, because 6358818661 - 2¹¹ = 6358816613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6358818599 and 6358818608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6358818061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 279876 + ... + 301741.

Almost surely, 2^6358818661 is an apocalyptic number.

It is an amenable number.

6358818661 is a deficient number, since it is larger than the sum of its proper divisors (733431231).

6358818661 is a wasteful number, since it uses less digits than its factorization.

6358818661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581688 (or 581659 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 52.

The square root of 6358818661 is about 79742.2012550444. The cubic root of 6358818661 is about 1852.6447355565.

The spelling of 6358818661 in words is "six billion, three hundred fifty-eight million, eight hundred eighteen thousand, six hundred sixty-one".