66016770520156 has 48 divisors (see below), whose sum is σ = 119684104727040. Its totient is φ = 31824576244160.

The previous prime is 66016770520153. The next prime is 66016770520187. The reversal of 66016770520156 is 65102507761066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66016770520153) 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, 1338216411 + ... + 1338265741.

It is an arithmetic number, because the mean of its divisors is an integer number (2493418848480).

Almost surely, 2^{66016770520156} is an apocalyptic number.

It is an amenable number.

66016770520156 is a deficient number, since it is larger than the sum of its proper divisors (53667334206884).

66016770520156 is a wasteful number, since it uses less digits than its factorization.

66016770520156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65634 (or 65632 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 66016770520156 in words is "sixty-six trillion, sixteen billion, seven hundred seventy million, five hundred twenty thousand, one hundred fifty-six".