33989966623 has 12 divisors (see below), whose sum is σ = 34387787344. Its totient is φ = 33596640000.

The previous prime is 33989966581. The next prime is 33989966627. The reversal of 33989966623 is 32666998933.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-33989966623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33989966627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6862798 + ... + 6867748.

Almost surely, 2^33989966623 is an apocalyptic number.

33989966623 is a deficient number, since it is larger than the sum of its proper divisors (397820721).

33989966623 is an equidigital number, since it uses as much as digits as its factorization.

33989966623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5826 (or 5725 counting only the distinct ones).

The product of its digits is 68024448, while the sum is 64.

The spelling of 33989966623 in words is "thirty-three billion, nine hundred eighty-nine million, nine hundred sixty-six thousand, six hundred twenty-three".