33668838681 has 8 divisors (see below), whose sum is σ = 46105076544. Its totient is φ = 21839246640.

The previous prime is 33668838677. The next prime is 33668838713. The reversal of 33668838681 is 18683886633.

It is a happy number.

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

It is not a de Polignac number, because 33668838681 - 2² = 33668838677 is a prime.

It is a super-2 number, since 2×33668838681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33668838781) 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, 151661325 + ... + 151661546.

It is an arithmetic number, because the mean of its divisors is an integer number (5763134568).

Almost surely, 2^33668838681 is an apocalyptic number.

It is an amenable number.

33668838681 is a deficient number, since it is larger than the sum of its proper divisors (12436237863).

33668838681 is a wasteful number, since it uses less digits than its factorization.

33668838681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303322911.

The product of its digits is 23887872, while the sum is 60.

The spelling of 33668838681 in words is "thirty-three billion, six hundred sixty-eight million, eight hundred thirty-eight thousand, six hundred eighty-one".