66120832 has 32 divisors (see below), whose sum is σ = 132139980. Its totient is φ = 32956416.

The previous prime is 66120829. The next prime is 66120833. The reversal of 66120832 is 23802166.

It can be written as a sum of positive squares in 2 ways, for example, as 63107136 + 3013696 = 7944^2 + 1736^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 66120832.

It is not an unprimeable number, because it can be changed into a prime (66120833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54828 + ... + 56020.

Almost surely, 2^66120832 is an apocalyptic number.

It is an amenable number.

66120832 is a deficient number, since it is larger than the sum of its proper divisors (66019148).

66120832 is a wasteful number, since it uses less digits than its factorization.

66120832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640 (or 1628 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 66120832 is about 8131.4716995142. The cubic root of 66120832 is about 404.3704734859.

Adding to 66120832 its reverse (23802166), we get a palindrome (89922998).

The spelling of 66120832 in words is "sixty-six million, one hundred twenty thousand, eight hundred thirty-two".