33989940663 has 32 divisors (see below), whose sum is σ = 53191649280. Its totient is φ = 18901175040.

The previous prime is 33989940653. The next prime is 33989940671. The reversal of 33989940663 is 36604998933.

It is not a de Polignac number, because 33989940663 - 2⁶ = 33989940599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33989940597 and 33989940606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33989940653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 292098 + ... + 391536.

It is an arithmetic number, because the mean of its divisors is an integer number (1662239040).

Almost surely, 2^33989940663 is an apocalyptic number.

33989940663 is a deficient number, since it is larger than the sum of its proper divisors (19201708617).

33989940663 is a wasteful number, since it uses less digits than its factorization.

33989940663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99887.

The product of its (nonzero) digits is 22674816, while the sum is 60.

The spelling of 33989940663 in words is "thirty-three billion, nine hundred eighty-nine million, nine hundred forty thousand, six hundred sixty-three".