1671411066581 has 8 divisors (see below), whose sum is σ = 1672152414240. Its totient is φ = 1670669883792.

The previous prime is 1671411066547. The next prime is 1671411066583. The reversal of 1671411066581 is 1856601141761.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1671411066581 is a prime.

It is a super-2 number, since 2×1671411066581² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671411066583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23007191 + ... + 23079723.

It is an arithmetic number, because the mean of its divisors is an integer number (209019051780).

Almost surely, 2^{1671411066581} is an apocalyptic number.

It is an amenable number.

1671411066581 is a deficient number, since it is larger than the sum of its proper divisors (741347659).

1671411066581 is an equidigital number, since it uses as much as digits as its factorization.

1671411066581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82435.

The product of its (nonzero) digits is 241920, while the sum is 47.

The spelling of 1671411066581 in words is "one trillion, six hundred seventy-one billion, four hundred eleven million, sixty-six thousand, five hundred eighty-one".