66473472 has 80 divisors (see below), whose sum is σ = 190769040. Its totient is φ = 20447232.

The previous prime is 66473443. The next prime is 66473489. The reversal of 66473472 is 27437466.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 66473472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18304 + ... + 21632.

It is an arithmetic number, because the mean of its divisors is an integer number (2384613).

Almost surely, 2^66473472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66473472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95384520).

66473472 is an abundant number, since it is smaller than the sum of its proper divisors (124295568).

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

66473472 is a wasteful number, since it uses less digits than its factorization.

66473472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363 (or 3347 counting only the distinct ones).

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

The square root of 66473472 is about 8153.1265168646. The cubic root of 66473472 is about 405.0880710769.

The spelling of 66473472 in words is "sixty-six million, four hundred seventy-three thousand, four hundred seventy-two".