66253512 has 64 divisors (see below), whose sum is σ = 179847360. Its totient is φ = 20217600.

The previous prime is 66253489. The next prime is 66253543. The reversal of 66253512 is 21535266.

It is a self number, because there is not a number n which added to its sum of digits gives 66253512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40062 + ... + 41682.

It is an arithmetic number, because the mean of its divisors is an integer number (2810115).

Almost surely, 2^66253512 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 66253512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89923680).

66253512 is an abundant number, since it is smaller than the sum of its proper divisors (113593848).

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

66253512 is a wasteful number, since it uses less digits than its factorization.

66253512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774 (or 1770 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 66253512 is about 8139.6260356358. The cubic root of 66253512 is about 404.6407666561.

Adding to 66253512 its reverse (21535266), we get a palindrome (87788778).

The spelling of 66253512 in words is "sixty-six million, two hundred fifty-three thousand, five hundred twelve".