66845452 has 24 divisors (see below), whose sum is σ = 122363136. Its totient is φ = 31891728.

The previous prime is 66845399. The next prime is 66845453. The reversal of 66845452 is 25454866.

It is not an unprimeable number, because it can be changed into a prime (66845453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58963 + ... + 60085.

It is an arithmetic number, because the mean of its divisors is an integer number (5098464).

Almost surely, 2^66845452 is an apocalyptic number.

It is an amenable number.

66845452 is a deficient number, since it is larger than the sum of its proper divisors (55517684).

66845452 is a wasteful number, since it uses less digits than its factorization.

66845452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1795 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

The square root of 66845452 is about 8175.9067998602. The cubic root of 66845452 is about 405.8422790027.

The spelling of 66845452 in words is "sixty-six million, eight hundred forty-five thousand, four hundred fifty-two".