66730570 has 16 divisors (see below), whose sum is σ = 120854880. Its totient is φ = 26527824.

The previous prime is 66730519. The next prime is 66730571. The reversal of 66730570 is 7503766.

It is a super-4 number, since 4×66730570⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (66730571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18840 + ... + 22099.

It is an arithmetic number, because the mean of its divisors is an integer number (7553430).

Almost surely, 2^66730570 is an apocalyptic number.

66730570 is a deficient number, since it is larger than the sum of its proper divisors (54124310).

66730570 is a wasteful number, since it uses less digits than its factorization.

66730570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41109.

The product of its (nonzero) digits is 26460, while the sum is 34.

The square root of 66730570 is about 8168.8781359499. The cubic root of 66730570 is about 405.6096493249.

The spelling of 66730570 in words is "sixty-six million, seven hundred thirty thousand, five hundred seventy".