66023728 has 10 divisors (see below), whose sum is σ = 127921004. Its totient is φ = 33011856.

The previous prime is 66023719. The next prime is 66023747. The reversal of 66023728 is 82732066.

It is a junction number, because it is equal to n+sod(n) for n = 66023693 and 66023702.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2063226 + ... + 2063257.

Almost surely, 2^66023728 is an apocalyptic number.

It is an amenable number.

66023728 is a deficient number, since it is larger than the sum of its proper divisors (61897276).

66023728 is a wasteful number, since it uses less digits than its factorization.

66023728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126491 (or 4126485 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 66023728 is about 8125.4986308534. The cubic root of 66023728 is about 404.1724258269.

The spelling of 66023728 in words is "sixty-six million, twenty-three thousand, seven hundred twenty-eight".