66512022 has 16 divisors (see below), whose sum is σ = 137611440. Its totient is φ = 21406112.

The previous prime is 66512011. The next prime is 66512029. The reversal of 66512022 is 22021566.

It is a junction number, because it is equal to n+sod(n) for n = 66511983 and 66512001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66512029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190953 + ... + 191300.

It is an arithmetic number, because the mean of its divisors is an integer number (8600715).

Almost surely, 2^66512022 is an apocalyptic number.

66512022 is an abundant number, since it is smaller than the sum of its proper divisors (71099418).

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

66512022 is a wasteful number, since it uses less digits than its factorization.

66512022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382287.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 66512022 is about 8155.4902979527. The cubic root of 66512022 is about 405.1663635991.

Adding to 66512022 its reverse (22021566), we get a palindrome (88533588).

The spelling of 66512022 in words is "sixty-six million, five hundred twelve thousand, twenty-two".