33400640668 has 12 divisors (see below), whose sum is σ = 58463535312. Its totient is φ = 16696773440.

The previous prime is 33400640659. The next prime is 33400640701. The reversal of 33400640668 is 86604600433.

It is a super-2 number, since 2×33400640668² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33400640668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865480 + ... + 903247.

It is an arithmetic number, because the mean of its divisors is an integer number (4871961276).

Almost surely, 2^33400640668 is an apocalyptic number.

It is an amenable number.

33400640668 is a deficient number, since it is larger than the sum of its proper divisors (25062894644).

33400640668 is a wasteful number, since it uses less digits than its factorization.

33400640668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773452 (or 1773450 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

The spelling of 33400640668 in words is "thirty-three billion, four hundred million, six hundred forty thousand, six hundred sixty-eight".