705666049 has 4 divisors (see below), whose sum is σ = 769817520. Its totient is φ = 641514580.

The previous prime is 705666011. The next prime is 705666053. The reversal of 705666049 is 940666507.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 705666049 - 2⁹ = 705665537 is a prime.

It is a super-2 number, since 2×705666049² = 995929145422540802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 705665996 and 705666014.

It is not an unprimeable number, because it can be changed into a prime (705666149) 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, 32075719 + ... + 32075740.

It is an arithmetic number, because the mean of its divisors is an integer number (192454380).

Almost surely, 2^705666049 is an apocalyptic number.

It is an amenable number.

705666049 is a deficient number, since it is larger than the sum of its proper divisors (64151471).

705666049 is a wasteful number, since it uses less digits than its factorization.

705666049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64151470.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 705666049 is about 26564.3755620191. The cubic root of 705666049 is about 890.2932371278.

It can be divided in two parts, 7056 and 66049, that multiplied together give a square (466041744 = 21588²).

The spelling of 705666049 in words is "seven hundred five million, six hundred sixty-six thousand, forty-nine".