66386432 has 40 divisors (see below), whose sum is σ = 151600416. Its totient is φ = 28449792.

The previous prime is 66386429. The next prime is 66386449. The reversal of 66386432 is 23468366.

66386432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 5678 + ... + 12845.

Almost surely, 2^66386432 is an apocalyptic number.

It is an amenable number.

66386432 is an abundant number, since it is smaller than the sum of its proper divisors (85213984).

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

66386432 is an equidigital number, since it uses as much as digits as its factorization.

66386432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18548 (or 18532 counting only the distinct ones).

The product of its digits is 124416, while the sum is 38.

The square root of 66386432 is about 8147.7869387951. The cubic root of 66386432 is about 404.9111871506.

The spelling of 66386432 in words is "sixty-six million, three hundred eighty-six thousand, four hundred thirty-two".