66984312 has 32 divisors (see below), whose sum is σ = 167662080. Its totient is φ = 22301280.

The previous prime is 66984277. The next prime is 66984343. The reversal of 66984312 is 21348966.

It is a super-2 number, since 2×66984312² = 8973796108226688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35833 + ... + 37655.

It is an arithmetic number, because the mean of its divisors is an integer number (5239440).

Almost surely, 2^66984312 is an apocalyptic number.

It is an amenable number.

66984312 is an abundant number, since it is smaller than the sum of its proper divisors (100677768).

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

66984312 is a wasteful number, since it uses less digits than its factorization.

66984312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363 (or 3359 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 66984312 is about 8184.3944186482. The cubic root of 66984312 is about 406.1231072882.

The spelling of 66984312 in words is "sixty-six million, nine hundred eighty-four thousand, three hundred twelve".