66759970 has 16 divisors (see below), whose sum is σ = 120435840. Its totient is φ = 26644464.

The previous prime is 66759967. The next prime is 66759989. The reversal of 66759970 is 7995766.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2580 + ... + 11839.

It is an arithmetic number, because the mean of its divisors is an integer number (7527240).

Almost surely, 2^66759970 is an apocalyptic number.

66759970 is a deficient number, since it is larger than the sum of its proper divisors (53675870).

66759970 is a wasteful number, since it uses less digits than its factorization.

66759970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14889.

The product of its (nonzero) digits is 714420, while the sum is 49.

The square root of 66759970 is about 8170.6774504933. The cubic root of 66759970 is about 405.6692080990.

The spelling of 66759970 in words is "sixty-six million, seven hundred fifty-nine thousand, nine hundred seventy".