66115110551 has 8 divisors (see below), whose sum is σ = 76470489984. Its totient is φ = 55987322040.

The previous prime is 66115110527. The next prime is 66115110557. The reversal of 66115110551 is 15501151166.

66115110551 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.

It is a cyclic number.

It is not a de Polignac number, because 66115110551 - 2²² = 66110916247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66115110557) 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, 56897105 + ... + 56898266.

It is an arithmetic number, because the mean of its divisors is an integer number (9558811248).

Almost surely, 2^66115110551 is an apocalyptic number.

66115110551 is a deficient number, since it is larger than the sum of its proper divisors (10355379433).

66115110551 is a wasteful number, since it uses less digits than its factorization.

66115110551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113795461.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 66115110551 in words is "sixty-six billion, one hundred fifteen million, one hundred ten thousand, five hundred fifty-one".