66446472 has 32 divisors (see below), whose sum is σ = 175888800. Its totient is φ = 20845824.

The previous prime is 66446447. The next prime is 66446473. The reversal of 66446472 is 27464466.

It is a self number, because there is not a number n which added to its sum of digits gives 66446472.

It is not an unprimeable number, because it can be changed into a prime (66446473) 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, 81022 + ... + 81837.

It is an arithmetic number, because the mean of its divisors is an integer number (5496525).

Almost surely, 2^66446472 is an apocalyptic number.

It is an amenable number.

66446472 is an abundant number, since it is smaller than the sum of its proper divisors (109442328).

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

66446472 is a wasteful number, since it uses less digits than its factorization.

66446472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162885 (or 162881 counting only the distinct ones).

The product of its digits is 193536, while the sum is 39.

The square root of 66446472 is about 8151.4705421783. The cubic root of 66446472 is about 405.0332178211.

The spelling of 66446472 in words is "sixty-six million, four hundred forty-six thousand, four hundred seventy-two".