66428512 has 24 divisors (see below), whose sum is σ = 132928992. Its totient is φ = 32668800.

The previous prime is 66428491. The next prime is 66428539. The reversal of 66428512 is 21582466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15064 + ... + 18967.

It is an arithmetic number, because the mean of its divisors is an integer number (5538708).

Almost surely, 2^66428512 is an apocalyptic number.

It is an amenable number.

66428512 is an abundant number, since it is smaller than the sum of its proper divisors (66500480).

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

66428512 is a wasteful number, since it uses less digits than its factorization.

66428512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34102 (or 34094 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 66428512 is about 8150.3688260103. The cubic root of 66428512 is about 404.9967220179.

The spelling of 66428512 in words is "sixty-six million, four hundred twenty-eight thousand, five hundred twelve".