1216006671 has 8 divisors (see below), whose sum is σ = 1768737024. Its totient is φ = 736973720.

The previous prime is 1216006643. The next prime is 1216006679. The reversal of 1216006671 is 1766006121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1216006671 - 2⁵ = 1216006639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216006679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18424311 + ... + 18424376.

It is an arithmetic number, because the mean of its divisors is an integer number (221092128).

Almost surely, 2^1216006671 is an apocalyptic number.

1216006671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1216006671 is a deficient number, since it is larger than the sum of its proper divisors (552730353).

1216006671 is a wasteful number, since it uses less digits than its factorization.

1216006671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36848701.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1216006671 is about 34871.2872002167. The cubic root of 1216006671 is about 1067.3626113391.

It can be divided in two parts, 121600 and 6671, that added together give a triangular number (128271 = T₅₀₆).

The spelling of 1216006671 in words is "one billion, two hundred sixteen million, six thousand, six hundred seventy-one".