1214199666 has 64 divisors (see below), whose sum is σ = 2859494400. Its totient is φ = 381225600.

The previous prime is 1214199641. The next prime is 1214199697. The reversal of 1214199666 is 6669914121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54751 + ... + 73661.

It is an arithmetic number, because the mean of its divisors is an integer number (44679600).

Almost surely, 2^1214199666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1214199666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1429747200).

1214199666 is an abundant number, since it is smaller than the sum of its proper divisors (1645294734).

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

1214199666 is a wasteful number, since it uses less digits than its factorization.

1214199666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18992 (or 18986 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 1214199666 is about 34845.3679274592. The cubic root of 1214199666 is about 1066.8336433695.

The spelling of 1214199666 in words is "one billion, two hundred fourteen million, one hundred ninety-nine thousand, six hundred sixty-six".