1661331119986 has 8 divisors (see below), whose sum is σ = 2545017886080. Its totient is φ = 812991824628.

The previous prime is 1661331119977. The next prime is 1661331120023. The reversal of 1661331119986 is 6899111331661.

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

It is a super-3 number, since 3×1661331119986³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8836867566 + ... + 8836867753.

It is an arithmetic number, because the mean of its divisors is an integer number (318127235760).

Almost surely, 2^{1661331119986} is an apocalyptic number.

1661331119986 is a deficient number, since it is larger than the sum of its proper divisors (883686766094).

1661331119986 is a wasteful number, since it uses less digits than its factorization.

1661331119986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17673735368.

The product of its digits is 1259712, while the sum is 55.

The spelling of 1661331119986 in words is "one trillion, six hundred sixty-one billion, three hundred thirty-one million, one hundred nineteen thousand, nine hundred eighty-six".