66190512 has 20 divisors (see below), whose sum is σ = 170992280. Its totient is φ = 22063488.

The previous prime is 66190511. The next prime is 66190519. The reversal of 66190512 is 21509166.

It is a self number, because there is not a number n which added to its sum of digits gives 66190512.

It is not an unprimeable number, because it can be changed into a prime (66190511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689437 + ... + 689532.

It is an arithmetic number, because the mean of its divisors is an integer number (8549614).

Almost surely, 2^66190512 is an apocalyptic number.

It is an amenable number.

66190512 is an abundant number, since it is smaller than the sum of its proper divisors (104801768).

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

66190512 is a wasteful number, since it uses less digits than its factorization.

66190512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378980 (or 1378974 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 66190512 is about 8135.7551585578. The cubic root of 66190512 is about 404.5124692926.

Adding to 66190512 its reverse (21509166), we get a palindrome (87699678).

The spelling of 66190512 in words is "sixty-six million, one hundred ninety thousand, five hundred twelve".