66543358 has 32 divisors (see below), whose sum is σ = 121363200. Its totient is φ = 26728704.

The previous prime is 66543349. The next prime is 66543397. The reversal of 66543358 is 85334566.

It is a self number, because there is not a number n which added to its sum of digits gives 66543358.

It is a congruent 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, 24513 + ... + 27091.

It is an arithmetic number, because the mean of its divisors is an integer number (3792600).

Almost surely, 2^66543358 is an apocalyptic number.

66543358 is a deficient number, since it is larger than the sum of its proper divisors (54819842).

66543358 is a wasteful number, since it uses less digits than its factorization.

66543358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704.

The product of its digits is 259200, while the sum is 40.

The square root of 66543358 is about 8157.4112315121. The cubic root of 66543358 is about 405.2299826734.

It can be divided in two parts, 6 and 6543358, that added together give a square (6543364 = 2558²).

The spelling of 66543358 in words is "sixty-six million, five hundred forty-three thousand, three hundred fifty-eight".