66680366 has 16 divisors (see below), whose sum is σ = 101436624. Its totient is φ = 32871744.

The previous prime is 66680359. The next prime is 66680377. The reversal of 66680366 is 66308666.

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 7 ways as a sum of consecutive naturals, for example, 43916 + ... + 45408.

It is an arithmetic number, because the mean of its divisors is an integer number (6339789).

Almost surely, 2^66680366 is an apocalyptic number.

66680366 is a deficient number, since it is larger than the sum of its proper divisors (34756258).

66680366 is a wasteful number, since it uses less digits than its factorization.

66680366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 66680366 is about 8165.8046755969. The cubic root of 66680366 is about 405.5079051735.

The spelling of 66680366 in words is "sixty-six million, six hundred eighty thousand, three hundred sixty-six".