66203475165 has 48 divisors (see below), whose sum is σ = 116284267008. Its totient is φ = 34840366848.

The previous prime is 66203475161. The next prime is 66203475179. The reversal of 66203475165 is 56157430266.

66203475165 is a `hidden beast` number, since 6 + 620 + 3 + 4 + 7 + 5 + 16 + 5 = 666.

It is not a de Polignac number, because 66203475165 - 2² = 66203475161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66203475165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66203475161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 997404 + ... + 1061706.

It is an arithmetic number, because the mean of its divisors is an integer number (2422588896).

Almost surely, 2^66203475165 is an apocalyptic number.

It is an amenable number.

66203475165 is a deficient number, since it is larger than the sum of its proper divisors (50080791843).

66203475165 is a wasteful number, since it uses less digits than its factorization.

66203475165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64618 (or 64615 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 66203475165 in words is "sixty-six billion, two hundred three million, four hundred seventy-five thousand, one hundred sixty-five".