1210716666 has 32 divisors (see below), whose sum is σ = 2730646080. Its totient is φ = 397547568.

The previous prime is 1210716623. The next prime is 1210716677. The reversal of 1210716666 is 6666170121.

It is a self number, because there is not a number n which added to its sum of digits gives 1210716666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163701 + ... + 170936.

It is an arithmetic number, because the mean of its divisors is an integer number (85332690).

Almost surely, 2^1210716666 is an apocalyptic number.

1210716666 is an abundant number, since it is smaller than the sum of its proper divisors (1519929414).

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

1210716666 is a wasteful number, since it uses less digits than its factorization.

1210716666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334715 (or 334709 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1210716666 is about 34795.3540864294. The cubic root of 1210716666 is about 1065.8125756563.

Adding to 1210716666 its reverse (6666170121), we get a palindrome (7876886787).

The spelling of 1210716666 in words is "one billion, two hundred ten million, seven hundred sixteen thousand, six hundred sixty-six".