33666969697 has 4 divisors (see below), whose sum is σ = 33747320880. Its totient is φ = 33586618516.

The previous prime is 33666969689. The next prime is 33666969727. The reversal of 33666969697 is 79696966633.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79696966633 = 59447 ⋅1340639.

It is a cyclic number.

It is not a de Polignac number, because 33666969697 - 2³ = 33666969689 is a prime.

It is a super-2 number, since 2×33666969697² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33666960697) 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, 40174963 + ... + 40175800.

It is an arithmetic number, because the mean of its divisors is an integer number (8436830220).

Almost surely, 2^33666969697 is an apocalyptic number.

It is an amenable number.

33666969697 is a deficient number, since it is larger than the sum of its proper divisors (80351183).

33666969697 is an equidigital number, since it uses as much as digits as its factorization.

33666969697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80351182.

The product of its digits is 357128352, while the sum is 70.

The spelling of 33666969697 in words is "thirty-three billion, six hundred sixty-six million, nine hundred sixty-nine thousand, six hundred ninety-seven".