66701705 has 16 divisors (see below), whose sum is σ = 92582784. Its totient is φ = 45185280.

The previous prime is 66701689. The next prime is 66701717. The reversal of 66701705 is 50710766.

It is not a de Polignac number, because 66701705 - 2⁴ = 66701689 is a prime.

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, 8576 + ... + 14385.

It is an arithmetic number, because the mean of its divisors is an integer number (5786424).

Almost surely, 2^66701705 is an apocalyptic number.

It is an amenable number.

66701705 is a deficient number, since it is larger than the sum of its proper divisors (25881079).

66701705 is a wasteful number, since it uses less digits than its factorization.

66701705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23056.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 66701705 is about 8167.1111783788. Note that the first 4 decimals coincide. The cubic root of 66701705 is about 405.5511573371.

The spelling of 66701705 in words is "sixty-six million, seven hundred one thousand, seven hundred five".