66713705 has 8 divisors (see below), whose sum is σ = 82639104. Its totient is φ = 51649200.

The previous prime is 66713663. The next prime is 66713723. The reversal of 66713705 is 50731766.

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

It is not a de Polignac number, because 66713705 - 2⁶ = 66713641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 215051 + ... + 215360.

It is an arithmetic number, because the mean of its divisors is an integer number (10329888).

Almost surely, 2^66713705 is an apocalyptic number.

It is an amenable number.

66713705 is a deficient number, since it is larger than the sum of its proper divisors (15925399).

66713705 is a wasteful number, since it uses less digits than its factorization.

66713705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430447.

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 66713705 is about 8167.8457992301. The cubic root of 66713705 is about 405.5754761661.

The spelling of 66713705 in words is "sixty-six million, seven hundred thirteen thousand, seven hundred five".