664547422 has 16 divisors (see below), whose sum is σ = 1242790272. Its totient is φ = 258914520.

The previous prime is 664547419. The next prime is 664547423. The reversal of 664547422 is 224745466.

664547422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664547423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2157468 + ... + 2157775.

It is an arithmetic number, because the mean of its divisors is an integer number (77674392).

Almost surely, 2^664547422 is an apocalyptic number.

664547422 is a deficient number, since it is larger than the sum of its proper divisors (578242850).

664547422 is a wasteful number, since it uses less digits than its factorization.

664547422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4315263.

The product of its digits is 322560, while the sum is 40.

The square root of 664547422 is about 25778.8173118939. The cubic root of 664547422 is about 872.6538167743.

The spelling of 664547422 in words is "six hundred sixty-four million, five hundred forty-seven thousand, four hundred twenty-two".