66534012 has 18 divisors (see below), whose sum is σ = 168183288. Its totient is φ = 22177992.

The previous prime is 66534011. The next prime is 66534059. The reversal of 66534012 is 21043566.

66534012 is a `hidden beast` number, since 6 + 653 + 4 + 0 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×66534012² = 8853549505632288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66534011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 924048 + ... + 924119.

It is an arithmetic number, because the mean of its divisors is an integer number (9343516).

Almost surely, 2^66534012 is an apocalyptic number.

It is an amenable number.

66534012 is an abundant number, since it is smaller than the sum of its proper divisors (101649276).

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

66534012 is a wasteful number, since it uses less digits than its factorization.

66534012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848177 (or 1848172 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66534012 is about 8156.8383580895. The cubic root of 66534012 is about 405.2110102978.

Adding to 66534012 its reverse (21043566), we get a palindrome (87577578).

The spelling of 66534012 in words is "sixty-six million, five hundred thirty-four thousand, twelve".