13664467 has 2 divisors, whose sum is σ = 13664468. Its totient is φ = 13664466.

The previous prime is 13664429. The next prime is 13664471. The reversal of 13664467 is 76446631.

It is a strong prime.

It is an emirp because it is prime and its reverse (76446631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13664467 is a prime.

It is not a weakly prime, because it can be changed into another prime (13661467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6832233 + 6832234.

It is an arithmetic number, because the mean of its divisors is an integer number (6832234).

Almost surely, 2^13664467 is an apocalyptic number.

13664467 is a deficient number, since it is larger than the sum of its proper divisors (1).

13664467 is an equidigital number, since it uses as much as digits as its factorization.

13664467 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 37.

The square root of 13664467 is about 3696.5479842686. The cubic root of 13664467 is about 239.0732022520.

The spelling of 13664467 in words is "thirteen million, six hundred sixty-four thousand, four hundred sixty-seven".