66320632 has 32 divisors (see below), whose sum is σ = 142387200. Its totient is φ = 28368864.

The previous prime is 66320627. The next prime is 66320647. The reversal of 66320632 is 23602366.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 66320632.

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, 45369 + ... + 46807.

It is an arithmetic number, because the mean of its divisors is an integer number (4449600).

Almost surely, 2^66320632 is an apocalyptic number.

It is an amenable number.

66320632 is an abundant number, since it is smaller than the sum of its proper divisors (76066568).

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

66320632 is a wasteful number, since it uses less digits than its factorization.

66320632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275 (or 2271 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 66320632 is about 8143.7480314656. The cubic root of 66320632 is about 404.7773648079. Note that the first 3 decimals are identical.

Adding to 66320632 its reverse (23602366), we get a palindrome (89922998).

The spelling of 66320632 in words is "sixty-six million, three hundred twenty thousand, six hundred thirty-two".