66100510055 has 8 divisors (see below), whose sum is σ = 80817227712. Its totient is φ = 51882664288.

The previous prime is 66100510013. The next prime is 66100510061. The reversal of 66100510055 is 55001500166.

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 66100510055 - 2¹⁰ = 66100509031 is a prime.

It is a super-2 number, since 2×66100510055² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124717679 + ... + 124718208.

It is an arithmetic number, because the mean of its divisors is an integer number (10102153464).

Almost surely, 2^66100510055 is an apocalyptic number.

66100510055 is a deficient number, since it is larger than the sum of its proper divisors (14716717657).

66100510055 is a wasteful number, since it uses less digits than its factorization.

66100510055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249435945.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 66100510055 in words is "sixty-six billion, one hundred million, five hundred ten thousand, fifty-five".