66895472 has 40 divisors (see below), whose sum is σ = 149323776. Its totient is φ = 28437696.

The previous prime is 66895463. The next prime is 66895501. The reversal of 66895472 is 27459866.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11873 + ... + 16575.

Almost surely, 2^66895472 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 66895472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74661888).

66895472 is an abundant number, since it is smaller than the sum of its proper divisors (82428304).

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

66895472 is a wasteful number, since it uses less digits than its factorization.

66895472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4845 (or 4839 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The square root of 66895472 is about 8178.9652157226. The cubic root of 66895472 is about 405.9434834416.

The spelling of 66895472 in words is "sixty-six million, eight hundred ninety-five thousand, four hundred seventy-two".