66834705 has 64 divisors (see below), whose sum is σ = 129392640. Its totient is φ = 28809984.

The previous prime is 66834697. The next prime is 66834731. The reversal of 66834705 is 50743866.

It is not a de Polignac number, because 66834705 - 2³ = 66834697 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 142882 + ... + 143348.

It is an arithmetic number, because the mean of its divisors is an integer number (2021760).

Almost surely, 2^66834705 is an apocalyptic number.

It is an amenable number.

66834705 is a deficient number, since it is larger than the sum of its proper divisors (62557935).

66834705 is a wasteful number, since it uses less digits than its factorization.

66834705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 66834705 is about 8175.2495374759. The cubic root of 66834705 is about 405.8205282298.

The spelling of 66834705 in words is "sixty-six million, eight hundred thirty-four thousand, seven hundred five".