664474071 has 32 divisors (see below), whose sum is σ = 963648000. Its totient is φ = 405998208.

The previous prime is 664474039. The next prime is 664474123. The reversal of 664474071 is 170474466.

It is a happy number.

It is not a de Polignac number, because 664474071 - 2⁵ = 664474039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664474171) 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 31 ways as a sum of consecutive naturals, for example, 276945 + ... + 279333.

It is an arithmetic number, because the mean of its divisors is an integer number (30114000).

Almost surely, 2^664474071 is an apocalyptic number.

664474071 is a deficient number, since it is larger than the sum of its proper divisors (299173929).

664474071 is a wasteful number, since it uses less digits than its factorization.

664474071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 664474071 is about 25777.3945735406. The cubic root of 664474071 is about 872.6217085137.

The spelling of 664474071 in words is "six hundred sixty-four million, four hundred seventy-four thousand, seventy-one".