66456012 has 48 divisors (see below), whose sum is σ = 178959872. Its totient is φ = 18800640.

The previous prime is 66456001. The next prime is 66456017. The reversal of 66456012 is 21065466.

It is not an unprimeable number, because it can be changed into a prime (66456017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4812 + ... + 12492.

Almost surely, 2^66456012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66456012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89479936).

66456012 is an abundant number, since it is smaller than the sum of its proper divisors (112503860).

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

66456012 is a wasteful number, since it uses less digits than its factorization.

66456012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7798 (or 7796 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66456012 is about 8152.0556916645. The cubic root of 66456012 is about 405.0526010021.

The spelling of 66456012 in words is "sixty-six million, four hundred fifty-six thousand, twelve".