1666947222 has 32 divisors (see below), whose sum is σ = 3738960000. Its totient is φ = 550454184.

The previous prime is 1666947211. The next prime is 1666947229. The reversal of 1666947222 is 2227496661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666947229) 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, 138472 + ... + 150027.

It is an arithmetic number, because the mean of its divisors is an integer number (116842500).

Almost surely, 2^1666947222 is an apocalyptic number.

1666947222 is an abundant number, since it is smaller than the sum of its proper divisors (2072012778).

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

1666947222 is a wasteful number, since it uses less digits than its factorization.

1666947222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288617 (or 288611 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 1666947222 is about 40828.2649888530. The cubic root of 1666947222 is about 1185.6976247899.

The spelling of 1666947222 in words is "one billion, six hundred sixty-six million, nine hundred forty-seven thousand, two hundred twenty-two".