66850312 has 8 divisors (see below), whose sum is σ = 125344350. Its totient is φ = 33425152.

The previous prime is 66850253. The next prime is 66850319. The reversal of 66850312 is 21305866.

It can be written as a sum of positive squares in only one way, i.e., 62631396 + 4218916 = 7914^2 + 2054^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66850319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4178137 + ... + 4178152.

Almost surely, 2^66850312 is an apocalyptic number.

It is an amenable number.

66850312 is a deficient number, since it is larger than the sum of its proper divisors (58494038).

66850312 is a wasteful number, since it uses less digits than its factorization.

66850312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8356295 (or 8356291 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 66850312 is about 8176.2040091964. The cubic root of 66850312 is about 405.8521143548.

The spelling of 66850312 in words is "sixty-six million, eight hundred fifty thousand, three hundred twelve".