664170105 has 16 divisors (see below), whose sum is σ = 1063183680. Its totient is φ = 354053568.

The previous prime is 664170097. The next prime is 664170107. The reversal of 664170105 is 501071466.

It is not a de Polignac number, because 664170105 - 2³ = 664170097 is a prime.

It is a super-2 number, since 2×664170105² = 882243856751422050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664170107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25506 + ... + 44484.

It is an arithmetic number, because the mean of its divisors is an integer number (66448980).

Almost surely, 2^664170105 is an apocalyptic number.

It is an amenable number.

664170105 is a deficient number, since it is larger than the sum of its proper divisors (399013575).

664170105 is a wasteful number, since it uses less digits than its factorization.

664170105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21320.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 664170105 is about 25771.4979192130. The cubic root of 664170105 is about 872.4886269293.

The spelling of 664170105 in words is "six hundred sixty-four million, one hundred seventy thousand, one hundred five".