664009416 has 96 divisors (see below), whose sum is σ = 2163470400. Its totient is φ = 179729280.

The previous prime is 664009343. The next prime is 664009427. The reversal of 664009416 is 614900466.

664009416 is a `hidden beast` number, since 6 + 640 + 0 + 9 + 4 + 1 + 6 = 666.

It is a super-2 number, since 2×664009416² = 881817009073322112, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 25095 + ... + 44246.

It is an arithmetic number, because the mean of its divisors is an integer number (22536150).

Almost surely, 2^664009416 is an apocalyptic number.

It is an amenable number.

664009416 is an abundant number, since it is smaller than the sum of its proper divisors (1499460984).

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

664009416 is a wasteful number, since it uses less digits than its factorization.

664009416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69379 (or 69372 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 664009416 is about 25768.3801586363. The cubic root of 664009416 is about 872.4182580925.

The spelling of 664009416 in words is "six hundred sixty-four million, nine thousand, four hundred sixteen".