66500705 has 8 divisors (see below), whose sum is σ = 83270592. Its totient is φ = 50887408.

The previous prime is 66500689. The next prime is 66500771. The reversal of 66500705 is 50700566.

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

It is not a de Polignac number, because 66500705 - 2⁴ = 66500689 is a prime.

It is a Duffinian number.

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, 289019 + ... + 289248.

It is an arithmetic number, because the mean of its divisors is an integer number (10408824).

Almost surely, 2^66500705 is an apocalyptic number.

It is an amenable number.

66500705 is a deficient number, since it is larger than the sum of its proper divisors (16769887).

66500705 is a wasteful number, since it uses less digits than its factorization.

66500705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578295.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 66500705 is about 8154.7964413589. The cubic root of 66500705 is about 405.1433826518.

The spelling of 66500705 in words is "sixty-six million, five hundred thousand, seven hundred five".