1666422436 has 48 divisors (see below), whose sum is σ = 3523968000. Its totient is φ = 673563168.

The previous prime is 1666422377. The next prime is 1666422463. The reversal of 1666422436 is 6342246661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113865 + ... + 127663.

It is an arithmetic number, because the mean of its divisors is an integer number (73416000).

Almost surely, 2^1666422436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666422436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1761984000).

1666422436 is an abundant number, since it is smaller than the sum of its proper divisors (1857545564).

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

1666422436 is a wasteful number, since it uses less digits than its factorization.

1666422436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14056 (or 14054 counting only the distinct ones).

The product of its digits is 248832, while the sum is 40.

The square root of 1666422436 is about 40821.8377342324. The cubic root of 1666422436 is about 1185.5731851727.

The spelling of 1666422436 in words is "one billion, six hundred sixty-six million, four hundred twenty-two thousand, four hundred thirty-six".