66320258 has 16 divisors (see below), whose sum is σ = 101512320. Its totient is φ = 32489856.

The previous prime is 66320251. The next prime is 66320269. The reversal of 66320258 is 85202366.

It is not an unprimeable number, because it can be changed into a prime (66320251) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 18323 + ... + 21641.

It is an arithmetic number, because the mean of its divisors is an integer number (6344520).

Almost surely, 2^66320258 is an apocalyptic number.

66320258 is a deficient number, since it is larger than the sum of its proper divisors (35192062).

66320258 is a wasteful number, since it uses less digits than its factorization.

66320258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 66320258 is about 8143.7250690332. The cubic root of 66320258 is about 404.7766039234.

The spelling of 66320258 in words is "sixty-six million, three hundred twenty thousand, two hundred fifty-eight".