67440401 has 8 divisors (see below), whose sum is σ = 77184960. Its totient is φ = 57723408.

The previous prime is 67440353. The next prime is 67440403. The reversal of 67440401 is 10404476.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67440401 - 2²² = 63246097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67440403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346 + ... + 11691.

It is an arithmetic number, because the mean of its divisors is an integer number (9648120).

Almost surely, 2^67440401 is an apocalyptic number.

It is an amenable number.

67440401 is a deficient number, since it is larger than the sum of its proper divisors (9744559).

67440401 is a wasteful number, since it uses less digits than its factorization.

67440401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13783.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 67440401 is about 8212.2104819592. The cubic root of 67440401 is about 407.0427727023.

Adding to 67440401 its reverse (10404476), we get a palindrome (77844877).

The spelling of 67440401 in words is "sixty-seven million, four hundred forty thousand, four hundred one".