66898312 has 24 divisors (see below), whose sum is σ = 135828090. Its totient is φ = 30875520.

The previous prime is 66898309. The next prime is 66898313. The reversal of 66898312 is 21389866.

It can be written as a sum of positive squares in 3 ways, for example, as 20304036 + 46594276 = 4506^2 + 6826^2 .

It is not an unprimeable number, because it can be changed into a prime (66898313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23389 + ... + 26092.

Almost surely, 2^66898312 is an apocalyptic number.

It is an amenable number.

66898312 is an abundant number, since it is smaller than the sum of its proper divisors (68929778).

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

66898312 is a wasteful number, since it uses less digits than its factorization.

66898312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49513 (or 49496 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The square root of 66898312 is about 8179.1388299747. The cubic root of 66898312 is about 405.9492280416.

The spelling of 66898312 in words is "sixty-six million, eight hundred ninety-eight thousand, three hundred twelve".