66354612 has 48 divisors (see below), whose sum is σ = 165312000. Its totient is φ = 20653920.

The previous prime is 66354583. The next prime is 66354619. The reversal of 66354612 is 21645366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66354619) 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 15 ways as a sum of consecutive naturals, for example, 14139 + ... + 18237.

It is an arithmetic number, because the mean of its divisors is an integer number (3444000).

Almost surely, 2^66354612 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 66354612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82656000).

66354612 is an abundant number, since it is smaller than the sum of its proper divisors (98957388).

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

66354612 is a wasteful number, since it uses less digits than its factorization.

66354612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4196 (or 4194 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 66354612 is about 8145.8340272804. The cubic root of 66354612 is about 404.8464835022.

Adding to 66354612 its reverse (21645366), we get a palindrome (87999978).

It can be divided in two parts, 66354 and 612, that added together give a palindrome (66966).

The spelling of 66354612 in words is "sixty-six million, three hundred fifty-four thousand, six hundred twelve".