66001515606055 has 16 divisors (see below), whose sum is σ = 79813615853664. Its totient is φ = 52393420493440.

The previous prime is 66001515606049. The next prime is 66001515606067. The reversal of 66001515606055 is 55060651510066.

It is not a de Polignac number, because 66001515606055 - 2³⁵ = 65967155867687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66001515605996 and 66001515606014.

It is a congruent 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, 2724057 + ... + 11807773.

It is an arithmetic number, because the mean of its divisors is an integer number (4988350990854).

Almost surely, 2^{66001515606055} is an apocalyptic number.

66001515606055 is a deficient number, since it is larger than the sum of its proper divisors (13812100247609).

66001515606055 is a wasteful number, since it uses less digits than its factorization.

66001515606055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9094946.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 66001515606055 in words is "sixty-six trillion, one billion, five hundred fifteen million, six hundred six thousand, fifty-five".