66574552 has 32 divisors (see below), whose sum is σ = 136993680. Its totient is φ = 30079360.

The previous prime is 66574523. The next prime is 66574553. The reversal of 66574552 is 25547566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66574553) by changing a digit.

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, 13038 + ... + 17410.

Almost surely, 2^66574552 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 66574552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68496840).

66574552 is an abundant number, since it is smaller than the sum of its proper divisors (70419128).

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

66574552 is a wasteful number, since it uses less digits than its factorization.

66574552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563 (or 4559 counting only the distinct ones).

The product of its digits is 252000, while the sum is 40.

The square root of 66574552 is about 8159.3230111327. The cubic root of 66574552 is about 405.2932936221.

The spelling of 66574552 in words is "sixty-six million, five hundred seventy-four thousand, five hundred fifty-two".