66231705 has 8 divisors (see below), whose sum is σ = 105970752. Its totient is φ = 35323568.

The previous prime is 66231647. The next prime is 66231713. The reversal of 66231705 is 50713266.

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

It is a cyclic number.

It is not a de Polignac number, because 66231705 - 2¹⁷ = 66100633 is a prime.

It is a Curzon 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, 2207709 + ... + 2207738.

It is an arithmetic number, because the mean of its divisors is an integer number (13246344).

Almost surely, 2^66231705 is an apocalyptic number.

It is an amenable number.

66231705 is a deficient number, since it is larger than the sum of its proper divisors (39739047).

66231705 is a wasteful number, since it uses less digits than its factorization.

66231705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415455.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 66231705 is about 8138.2863675346. The cubic root of 66231705 is about 404.5963666476.

The spelling of 66231705 in words is "sixty-six million, two hundred thirty-one thousand, seven hundred five".