66450568 has 16 divisors (see below), whose sum is σ = 124681500. Its totient is φ = 33202176.

The previous prime is 66450539. The next prime is 66450583. The reversal of 66450568 is 86505466.

It can be written as a sum of positive squares in 2 ways, for example, as 66292164 + 158404 = 8142^2 + 398^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66450568.

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, 19968 + ... + 23056.

Almost surely, 2^66450568 is an apocalyptic number.

It is an amenable number.

66450568 is a deficient number, since it is larger than the sum of its proper divisors (58230932).

66450568 is a wasteful number, since it uses less digits than its factorization.

66450568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5784 (or 5780 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 66450568 is about 8151.7217813171. The cubic root of 66450568 is about 405.0415402191.

The spelling of 66450568 in words is "sixty-six million, four hundred fifty thousand, five hundred sixty-eight".