705666307 has 4 divisors (see below), whose sum is σ = 707342896. Its totient is φ = 703989720.

The previous prime is 705666301. The next prime is 705666323. The reversal of 705666307 is 703666507.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 705666307 - 2⁷ = 705666179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 705666307.

It is not an unprimeable number, because it can be changed into a prime (705666301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837663 + ... + 838504.

It is an arithmetic number, because the mean of its divisors is an integer number (176835724).

Almost surely, 2^705666307 is an apocalyptic number.

705666307 is a deficient number, since it is larger than the sum of its proper divisors (1676589).

705666307 is a wasteful number, since it uses less digits than its factorization.

705666307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676588.

The product of its (nonzero) digits is 158760, while the sum is 40.

The square root of 705666307 is about 26564.3804181464. The cubic root of 705666307 is about 890.2933456284.

The spelling of 705666307 in words is "seven hundred five million, six hundred sixty-six thousand, three hundred seven".