66041992 has 8 divisors (see below), whose sum is σ = 123828750. Its totient is φ = 33020992.

The previous prime is 66041977. The next prime is 66042001. The reversal of 66041992 is 29914066.

It can be written as a sum of positive squares in only one way, i.e., 60310756 + 5731236 = 7766^2 + 2394^2 .

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

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4127617 + ... + 4127632.

Almost surely, 2^66041992 is an apocalyptic number.

It is an amenable number.

66041992 is a deficient number, since it is larger than the sum of its proper divisors (57786758).

66041992 is a wasteful number, since it uses less digits than its factorization.

66041992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8255255 (or 8255251 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 66041992 is about 8126.6224226304. The cubic root of 66041992 is about 404.2096908368.

The spelling of 66041992 in words is "sixty-six million, forty-one thousand, nine hundred ninety-two".