66002170155 has 16 divisors (see below), whose sum is σ = 105641897760. Its totient is φ = 35188348928.

The previous prime is 66002170099. The next prime is 66002170159. The reversal of 66002170155 is 55107120066.

66002170155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66002170155 - 2⁸ = 66002169899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66002170159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757860 + ... + 840449.

It is an arithmetic number, because the mean of its divisors is an integer number (6602618610).

Almost surely, 2^66002170155 is an apocalyptic number.

66002170155 is a deficient number, since it is larger than the sum of its proper divisors (39639727605).

66002170155 is a wasteful number, since it uses less digits than its factorization.

66002170155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601070.

The product of its (nonzero) digits is 12600, while the sum is 33.

The spelling of 66002170155 in words is "sixty-six billion, two million, one hundred seventy thousand, one hundred fifty-five".