53816550666 has 8 divisors (see below), whose sum is σ = 107633101344. Its totient is φ = 17938850220.

The previous prime is 53816550637. The next prime is 53816550751. The reversal of 53816550666 is 66605561835.

It is a happy number.

53816550666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

53816550666 is an admirable number.

It is a super-2 number, since 2×53816550666² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 4484712550 + ... + 4484712561.

It is an arithmetic number, because the mean of its divisors is an integer number (13454137668).

Almost surely, 2^53816550666 is an apocalyptic number.

53816550666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

53816550666 is a wasteful number, since it uses less digits than its factorization.

53816550666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8969425116.

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 53816550666 in words is "fifty-three billion, eight hundred sixteen million, five hundred fifty thousand, six hundred sixty-six".