6698186561 has 8 divisors (see below), whose sum is σ = 7313786784. Its totient is φ = 6083698720.

The previous prime is 6698186543. The next prime is 6698186581. The reversal of 6698186561 is 1656818966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6698186561 - 2¹⁸ = 6697924417 is a prime.

It is a super-2 number, since 2×6698186561² = 89731406411922013442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6698186497 and 6698186506.

It is not an unprimeable number, because it can be changed into a prime (6698186581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265475 + ... + 289608.

It is an arithmetic number, because the mean of its divisors is an integer number (914223348).

Almost surely, 2^6698186561 is an apocalyptic number.

It is an amenable number.

6698186561 is a deficient number, since it is larger than the sum of its proper divisors (615600223).

6698186561 is a wasteful number, since it uses less digits than its factorization.

6698186561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556191.

The product of its digits is 3732480, while the sum is 56.

The square root of 6698186561 is about 81842.4496273175. The cubic root of 6698186561 is about 1885.0335310075.

The spelling of 6698186561 in words is "six billion, six hundred ninety-eight million, one hundred eighty-six thousand, five hundred sixty-one".