66510015105 has 16 divisors (see below), whose sum is σ = 106469360064. Its totient is φ = 35454229440.

The previous prime is 66510015097. The next prime is 66510015179. The reversal of 66510015105 is 50151001566.

66510015105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66510015105 - 2³ = 66510015097 is a prime.

It is a super-2 number, since 2×66510015105² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

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, 1080211 + ... + 1140120.

It is an arithmetic number, because the mean of its divisors is an integer number (6654335004).

Almost surely, 2^66510015105 is an apocalyptic number.

It is an amenable number.

66510015105 is a deficient number, since it is larger than the sum of its proper divisors (39959344959).

66510015105 is a wasteful number, since it uses less digits than its factorization.

66510015105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222336.

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 66510015105 in words is "sixty-six billion, five hundred ten million, fifteen thousand, one hundred five".