66170428263 has 24 divisors (see below), whose sum is σ = 96847470720. Its totient is φ = 43532171280.

The previous prime is 66170428249. The next prime is 66170428271. The reversal of 66170428263 is 36282407166.

66170428263 is a `hidden beast` number, since 6 + 617 + 0 + 4 + 2 + 8 + 26 + 3 = 666.

66170428263 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 66170428263 - 2¹⁸ = 66170166119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66170428283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54270 + ... + 367812.

It is an arithmetic number, because the mean of its divisors is an integer number (4035311280).

Almost surely, 2^66170428263 is an apocalyptic number.

66170428263 is a deficient number, since it is larger than the sum of its proper divisors (30677042457).

66170428263 is a wasteful number, since it uses less digits than its factorization.

66170428263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313859 (or 313856 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 66170428263 in words is "sixty-six billion, one hundred seventy million, four hundred twenty-eight thousand, two hundred sixty-three".