66145504 has 24 divisors (see below), whose sum is σ = 137885328. Its totient is φ = 31127040.

The previous prime is 66145489. The next prime is 66145531. The reversal of 66145504 is 40554166.

66145504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60252 + ... + 61339.

It is an arithmetic number, because the mean of its divisors is an integer number (5745222).

Almost surely, 2^66145504 is an apocalyptic number.

It is an amenable number.

66145504 is an abundant number, since it is smaller than the sum of its proper divisors (71739824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66145504 is a wasteful number, since it uses less digits than its factorization.

66145504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121618 (or 121610 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 66145504 is about 8132.9886265751. The cubic root of 66145504 is about 404.4207621640.

The spelling of 66145504 in words is "sixty-six million, one hundred forty-five thousand, five hundred four".