66361512 has 128 divisors (see below), whose sum is σ = 200620800. Its totient is φ = 17891328.

The previous prime is 66361441. The next prime is 66361531. The reversal of 66361512 is 21516366.

66361512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66361512² = 8807700549852288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66361512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258088 + ... + 258344.

It is an arithmetic number, because the mean of its divisors is an integer number (1567350).

Almost surely, 2^66361512 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 66361512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100310400).

66361512 is an abundant number, since it is smaller than the sum of its proper divisors (134259288).

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

66361512 is a wasteful number, since it uses less digits than its factorization.

66361512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 351 counting only the distinct ones).

The product of its digits is 6480, while the sum is 30.

The square root of 66361512 is about 8146.2575456463. The cubic root of 66361512 is about 404.8605159049.

Adding to 66361512 its reverse (21516366), we get a palindrome (87877878).

The spelling of 66361512 in words is "sixty-six million, three hundred sixty-one thousand, five hundred twelve".