66091298 has 32 divisors (see below), whose sum is σ = 124521600. Its totient is φ = 26142480.

The previous prime is 66091237. The next prime is 66091309. The reversal of 66091298 is 89219066.

66091298 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5213 + ... + 12623.

It is an arithmetic number, because the mean of its divisors is an integer number (3891300).

Almost surely, 2^66091298 is an apocalyptic number.

66091298 is a deficient number, since it is larger than the sum of its proper divisors (58430302).

66091298 is a wasteful number, since it uses less digits than its factorization.

66091298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7447 (or 7433 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 66091298 is about 8129.6554662544. The cubic root of 66091298 is about 404.3102581913.

The spelling of 66091298 in words is "sixty-six million, ninety-one thousand, two hundred ninety-eight".