705671661 has 8 divisors (see below), whose sum is σ = 941038560. Its totient is φ = 470376272.

The previous prime is 705671653. The next prime is 705671663. The reversal of 705671661 is 166176507.

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 705671661 - 2³ = 705671653 is a prime.

It is a super-3 number, since 3×705671661³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705671663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12550 + ... + 39608.

It is an arithmetic number, because the mean of its divisors is an integer number (117629820).

Almost surely, 2^705671661 is an apocalyptic number.

It is an amenable number.

705671661 is a deficient number, since it is larger than the sum of its proper divisors (235366899).

705671661 is a wasteful number, since it uses less digits than its factorization.

705671661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35755.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 705671661 is about 26564.4811919977. The cubic root of 705671661 is about 890.2955972207.

The spelling of 705671661 in words is "seven hundred five million, six hundred seventy-one thousand, six hundred sixty-one".