4166816781 has 8 divisors (see below), whose sum is σ = 5797310400. Its totient is φ = 2657100512.

The previous prime is 4166816749. The next prime is 4166816789. The reversal of 4166816781 is 1876186614.

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 4166816781 - 2⁵ = 4166816749 is a prime.

It is a super-2 number, since 2×4166816781² = 34724724172846403922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4166816781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4166816789) 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, 30194256 + ... + 30194393.

It is an arithmetic number, because the mean of its divisors is an integer number (724663800).

Almost surely, 2^4166816781 is an apocalyptic number.

It is an amenable number.

4166816781 is a deficient number, since it is larger than the sum of its proper divisors (1630493619).

4166816781 is a wasteful number, since it uses less digits than its factorization.

4166816781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60388675.

The product of its digits is 387072, while the sum is 48.

The square root of 4166816781 is about 64550.8852069435. The cubic root of 4166816781 is about 1609.1682986167.

The spelling of 4166816781 in words is "four billion, one hundred sixty-six million, eight hundred sixteen thousand, seven hundred eighty-one".