6659563854 has 64 divisors (see below), whose sum is σ = 13894391808. Its totient is φ = 2126325600.

The previous prime is 6659563843. The next prime is 6659563913. The reversal of 6659563854 is 4583659566.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6659563794 and 6659563803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3864237 + ... + 3865959.

It is an arithmetic number, because the mean of its divisors is an integer number (217099872).

Almost surely, 2^6659563854 is an apocalyptic number.

6659563854 is an abundant number, since it is smaller than the sum of its proper divisors (7234827954).

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

6659563854 is a wasteful number, since it uses less digits than its factorization.

6659563854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2053.

The product of its digits is 23328000, while the sum is 57.

The square root of 6659563854 is about 81606.1508343581. The cubic root of 6659563854 is about 1881.4034199828.

The spelling of 6659563854 in words is "six billion, six hundred fifty-nine million, five hundred sixty-three thousand, eight hundred fifty-four".