66065992 has 8 divisors (see below), whose sum is σ = 123873750. Its totient is φ = 33032992.

The previous prime is 66065977. The next prime is 66066043. The reversal of 66065992 is 29956066.

It can be written as a sum of positive squares in only one way, i.e., 47969476 + 18096516 = 6926^2 + 4254^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4129117 + ... + 4129132.

Almost surely, 2^66065992 is an apocalyptic number.

It is an amenable number.

66065992 is a deficient number, since it is larger than the sum of its proper divisors (57807758).

66065992 is a wasteful number, since it uses less digits than its factorization.

66065992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8258255 (or 8258251 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 66065992 is about 8128.0989167209. The cubic root of 66065992 is about 404.2586488678.

The spelling of 66065992 in words is "sixty-six million, sixty-five thousand, nine hundred ninety-two".