33664427 has 2 divisors, whose sum is σ = 33664428. Its totient is φ = 33664426.

The previous prime is 33664391. The next prime is 33664429. The reversal of 33664427 is 72446633.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 33664427 - 2⁶ = 33664363 is a prime.

It is a super-2 number, since 2×33664427² = 2266587290476658, which contains 22 as substring.

Together with 33664429, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (33664429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16832213 + 16832214.

It is an arithmetic number, because the mean of its divisors is an integer number (16832214).

Almost surely, 2^33664427 is an apocalyptic number.

33664427 is a deficient number, since it is larger than the sum of its proper divisors (1).

33664427 is an equidigital number, since it uses as much as digits as its factorization.

33664427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 35.

The square root of 33664427 is about 5802.1053937342. The cubic root of 33664427 is about 322.8918442818.

The spelling of 33664427 in words is "thirty-three million, six hundred sixty-four thousand, four hundred twenty-seven".