1966633333668 has 72 divisors (see below), whose sum is σ = 5202215928000. Its totient is φ = 625245736896.

The previous prime is 1966633333559. The next prime is 1966633333673. The reversal of 1966633333668 is 8663333366691.

It is a super-2 number, since 2×1966633333668² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3113838 + ... + 3691781.

It is an arithmetic number, because the mean of its divisors is an integer number (72252999000).

Almost surely, 2^{1966633333668} is an apocalyptic number.

1966633333668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1966633333668 is an abundant number, since it is smaller than the sum of its proper divisors (3235582594332).

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

1966633333668 is a wasteful number, since it uses less digits than its factorization.

1966633333668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6806001 (or 6805996 counting only the distinct ones).

The product of its digits is 136048896, while the sum is 63.

The spelling of 1966633333668 in words is "one trillion, nine hundred sixty-six billion, six hundred thirty-three million, three hundred thirty-three thousand, six hundred sixty-eight".