1664288222 has 4 divisors (see below), whose sum is σ = 2496432336. Its totient is φ = 832144110.

The previous prime is 1664288183. The next prime is 1664288233. The reversal of 1664288222 is 2228824661.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1664288222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416072054 + ... + 416072057.

It is an arithmetic number, because the mean of its divisors is an integer number (624108084).

Almost surely, 2^1664288222 is an apocalyptic number.

1664288222 is a deficient number, since it is larger than the sum of its proper divisors (832144114).

1664288222 is an equidigital number, since it uses as much as digits as its factorization.

1664288222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832144113.

The product of its digits is 147456, while the sum is 41.

The square root of 1664288222 is about 40795.6887673195. The cubic root of 1664288222 is about 1185.0668414052.

The spelling of 1664288222 in words is "one billion, six hundred sixty-four million, two hundred eighty-eight thousand, two hundred twenty-two".