66705098 has 8 divisors (see below), whose sum is σ = 100507008. Its totient is φ = 33202764.

The previous prime is 66705097. The next prime is 66705109. The reversal of 66705098 is 89050766.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (66705097) 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 3 ways as a sum of consecutive naturals, for example, 74336 + ... + 75227.

It is an arithmetic number, because the mean of its divisors is an integer number (12563376).

Almost surely, 2^66705098 is an apocalyptic number.

66705098 is a deficient number, since it is larger than the sum of its proper divisors (33801910).

66705098 is a wasteful number, since it uses less digits than its factorization.

66705098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149788.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 66705098 is about 8167.3188991247. The cubic root of 66705098 is about 405.5580337818.

The spelling of 66705098 in words is "sixty-six million, seven hundred five thousand, ninety-eight".