66507166 has 24 divisors (see below), whose sum is σ = 112345632. Its totient is φ = 29488800.

The previous prime is 66507151. The next prime is 66507173. The reversal of 66507166 is 66170566.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6571 + ... + 13273.

It is an arithmetic number, because the mean of its divisors is an integer number (4681068).

Almost surely, 2^66507166 is an apocalyptic number.

66507166 is a deficient number, since it is larger than the sum of its proper divisors (45838466).

66507166 is a wasteful number, since it uses less digits than its factorization.

66507166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768 (or 6757 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 66507166 is about 8155.1925789646. The cubic root of 66507166 is about 405.1565030471.

The spelling of 66507166 in words is "sixty-six million, five hundred seven thousand, one hundred sixty-six".