664616406 has 16 divisors (see below), whose sum is σ = 1330702848. Its totient is φ = 221293800.

The previous prime is 664616399. The next prime is 664616429. The reversal of 664616406 is 604616466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55330 + ... + 66261.

It is an arithmetic number, because the mean of its divisors is an integer number (83168928).

Almost surely, 2^664616406 is an apocalyptic number.

664616406 is an abundant number, since it is smaller than the sum of its proper divisors (666086442).

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

664616406 is a wasteful number, since it uses less digits than its factorization.

664616406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122507.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 664616406 is about 25780.1552749397. The cubic root of 664616406 is about 872.6840112927.

The spelling of 664616406 in words is "six hundred sixty-four million, six hundred sixteen thousand, four hundred six".