1664547222 has 32 divisors (see below), whose sum is σ = 3630574080. Its totient is φ = 505683360.

The previous prime is 1664547187. The next prime is 1664547223. The reversal of 1664547222 is 2227454661.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664547223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128904 + ... + 141227.

It is an arithmetic number, because the mean of its divisors is an integer number (113455440).

Almost surely, 2^1664547222 is an apocalyptic number.

1664547222 is an abundant number, since it is smaller than the sum of its proper divisors (1966026858).

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

1664547222 is a wasteful number, since it uses less digits than its factorization.

1664547222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270228.

The product of its digits is 161280, while the sum is 39.

The square root of 1664547222 is about 40798.8629988631. The cubic root of 1664547222 is about 1185.1283124067.

The spelling of 1664547222 in words is "one billion, six hundred sixty-four million, five hundred forty-seven thousand, two hundred twenty-two".