66120472 has 32 divisors (see below), whose sum is σ = 136972800. Its totient is φ = 29671200.

The previous prime is 66120433. The next prime is 66120473. The reversal of 66120472 is 27402166.

It is a self number, because there is not a number n which added to its sum of digits gives 66120472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66120473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2197 + ... + 11707.

It is an arithmetic number, because the mean of its divisors is an integer number (4280400).

Almost surely, 2^66120472 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 66120472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68486400).

66120472 is an abundant number, since it is smaller than the sum of its proper divisors (70852328).

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

66120472 is a wasteful number, since it uses less digits than its factorization.

66120472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9607 (or 9603 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 66120472 is about 8131.4495632698. The cubic root of 66120472 is about 404.3697396091.

The spelling of 66120472 in words is "sixty-six million, one hundred twenty thousand, four hundred seventy-two".