66750318 has 20 divisors (see below), whose sum is σ = 149570520. Its totient is φ = 22250052.

The previous prime is 66750269. The next prime is 66750329. The reversal of 66750318 is 81305766.

It is a super-2 number, since 2×66750318² = 8911209906202248, which contains 22 as substring.

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 9 ways as a sum of consecutive naturals, for example, 205858 + ... + 206181.

It is an arithmetic number, because the mean of its divisors is an integer number (7478526).

Almost surely, 2^66750318 is an apocalyptic number.

66750318 is an abundant number, since it is smaller than the sum of its proper divisors (82820202).

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

66750318 is a wasteful number, since it uses less digits than its factorization.

66750318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412053 (or 412044 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 66750318 is about 8170.0867804449. The cubic root of 66750318 is about 405.6496569223.

The spelling of 66750318 in words is "sixty-six million, seven hundred fifty thousand, three hundred eighteen".