66936984 has 32 divisors (see below), whose sum is σ = 169073520. Its totient is φ = 22081536.

The previous prime is 66936949. The next prime is 66936997. The reversal of 66936984 is 48963966.

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, 12049 + ... + 16704.

Almost surely, 2^66936984 is an apocalyptic number.

It is an amenable number.

66936984 is an abundant number, since it is smaller than the sum of its proper divisors (102136536).

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

66936984 is a wasteful number, since it uses less digits than its factorization.

66936984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28859 (or 28855 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 51.

The square root of 66936984 is about 8181.5025514877. The cubic root of 66936984 is about 406.0274355181.

The spelling of 66936984 in words is "sixty-six million, nine hundred thirty-six thousand, nine hundred eighty-four".