664042470 has 64 divisors (see below), whose sum is σ = 1961487360. Its totient is φ = 140105088.

The previous prime is 664042469. The next prime is 664042501. The reversal of 664042470 is 74240466.

It is a super-3 number, since 3×664042470³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118890 + ... + 124349.

It is an arithmetic number, because the mean of its divisors is an integer number (30648240).

Almost surely, 2^664042470 is an apocalyptic number.

664042470 is an abundant number, since it is smaller than the sum of its proper divisors (1297444890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664042470 is a wasteful number, since it uses less digits than its factorization.

664042470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243269.

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 664042470 is about 25769.0215180942. The cubic root of 664042470 is about 872.4327340090.

The spelling of 664042470 in words is "six hundred sixty-four million, forty-two thousand, four hundred seventy".