33233887661 has 4 divisors (see below), whose sum is σ = 35790340572. Its totient is φ = 30677434752.

The previous prime is 33233887649. The next prime is 33233887721. The reversal of 33233887661 is 16678833233.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14408401225 + 18825486436 = 120035^2 + 137206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33233887661 is a prime.

It is a super-2 number, since 2×33233887661² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33233887961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1278226436 + ... + 1278226461.

It is an arithmetic number, because the mean of its divisors is an integer number (8947585143).

Almost surely, 2^33233887661 is an apocalyptic number.

It is an amenable number.

33233887661 is a deficient number, since it is larger than the sum of its proper divisors (2556452911).

33233887661 is a wasteful number, since it uses less digits than its factorization.

33233887661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2556452910.

The product of its digits is 2612736, while the sum is 50.

The spelling of 33233887661 in words is "thirty-three billion, two hundred thirty-three million, eight hundred eighty-seven thousand, six hundred sixty-one".