66913250 has 32 divisors (see below), whose sum is σ = 131863680. Its totient is φ = 25354800.

The previous prime is 66913213. The next prime is 66913261. The reversal of 66913250 is 5231966.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2294 + ... + 11793.

It is an arithmetic number, because the mean of its divisors is an integer number (4120740).

Almost surely, 2^66913250 is an apocalyptic number.

66913250 is a deficient number, since it is larger than the sum of its proper divisors (64950430).

66913250 is a wasteful number, since it uses less digits than its factorization.

66913250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14123 (or 14113 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 66913250 is about 8180.0519558252. The cubic root of 66913250 is about 405.9794411520.

The spelling of 66913250 in words is "sixty-six million, nine hundred thirteen thousand, two hundred fifty".