705566665 has 16 divisors (see below), whose sum is σ = 904135680. Its totient is φ = 527405760.

The previous prime is 705566647. The next prime is 705566683. The reversal of 705566665 is 566665507.

It is an interprime number because it is at equal distance from previous prime (705566647) and next prime (705566683).

It is not a de Polignac number, because 705566665 - 2¹³ = 705558473 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, 73989 + ... + 82978.

It is an arithmetic number, because the mean of its divisors is an integer number (56508480).

Almost surely, 2^705566665 is an apocalyptic number.

It is an amenable number.

705566665 is a deficient number, since it is larger than the sum of its proper divisors (198569015).

705566665 is a wasteful number, since it uses less digits than its factorization.

705566665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157032.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The square root of 705566665 is about 26562.5048705878. The cubic root of 705566665 is about 890.2514397094.

The spelling of 705566665 in words is "seven hundred five million, five hundred sixty-six thousand, six hundred sixty-five".