66347472 has 40 divisors (see below), whose sum is σ = 172042560. Its totient is φ = 22032640.

The previous prime is 66347431. The next prime is 66347497. The reversal of 66347472 is 27474366.

66347472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66347472.

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 7 ways as a sum of consecutive naturals, for example, 11029 + ... + 15947.

It is an arithmetic number, because the mean of its divisors is an integer number (4301064).

Almost surely, 2^66347472 is an apocalyptic number.

It is an amenable number.

66347472 is an abundant number, since it is smaller than the sum of its proper divisors (105695088).

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

66347472 is a wasteful number, since it uses less digits than its factorization.

66347472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211 (or 5205 counting only the distinct ones).

The product of its digits is 169344, while the sum is 39.

The square root of 66347472 is about 8145.3957546580. The cubic root of 66347472 is about 404.8319619917.

The spelling of 66347472 in words is "sixty-six million, three hundred forty-seven thousand, four hundred seventy-two".