33668444405 has 16 divisors (see below), whose sum is σ = 41044274544. Its totient is φ = 26509731840.

The previous prime is 33668444401. The next prime is 33668444423. The reversal of 33668444405 is 50444486633.

It can be written as a sum of positive squares in 8 ways, for example, as 7003513969 + 26664930436 = 83687^2 + 163294^2 .

It is not a de Polignac number, because 33668444405 - 2² = 33668444401 is a prime.

It is a super-2 number, since 2×33668444405² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33668444405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33668444401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103982 + ... + 279551.

It is an arithmetic number, because the mean of its divisors is an integer number (2565267159).

Almost surely, 2^33668444405 is an apocalyptic number.

It is an amenable number.

33668444405 is a deficient number, since it is larger than the sum of its proper divisors (7375830139).

33668444405 is a wasteful number, since it uses less digits than its factorization.

33668444405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383816.

The product of its (nonzero) digits is 3317760, while the sum is 47.

The spelling of 33668444405 in words is "thirty-three billion, six hundred sixty-eight million, four hundred forty-four thousand, four hundred five".