66450572 has 6 divisors (see below), whose sum is σ = 116288508. Its totient is φ = 33225284.

The previous prime is 66450539. The next prime is 66450583. The reversal of 66450572 is 27505466.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8306318 + ... + 8306325.

It is an arithmetic number, because the mean of its divisors is an integer number (19381418).

Almost surely, 2^66450572 is an apocalyptic number.

It is an amenable number.

66450572 is a deficient number, since it is larger than the sum of its proper divisors (49837936).

66450572 is a wasteful number, since it uses less digits than its factorization.

66450572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16612647 (or 16612645 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 66450572 is about 8151.7220266641. The cubic root of 66450572 is about 405.0415483463.

The spelling of 66450572 in words is "sixty-six million, four hundred fifty thousand, five hundred seventy-two".