66550110505 has 16 divisors (see below), whose sum is σ = 84077061120. Its totient is φ = 50429720448.

The previous prime is 66550110463. The next prime is 66550110551. The reversal of 66550110505 is 50501105566.

It is a cyclic number.

It is not a de Polignac number, because 66550110505 - 2⁷ = 66550110377 is a prime.

It is a super-2 number, since 2×66550110505² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560824 + ... + 669046.

It is an arithmetic number, because the mean of its divisors is an integer number (5254816320).

Almost surely, 2^66550110505 is an apocalyptic number.

It is an amenable number.

66550110505 is a deficient number, since it is larger than the sum of its proper divisors (17526950615).

66550110505 is a wasteful number, since it uses less digits than its factorization.

66550110505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114720.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 66550110505 in words is "sixty-six billion, five hundred fifty million, one hundred ten thousand, five hundred five".