67401605 has 8 divisors (see below), whose sum is σ = 83068152. Its totient is φ = 52463808.

The previous prime is 67401601. The next prime is 67401611. The reversal of 67401605 is 50610476.

It can be written as a sum of positive squares in 4 ways, for example, as 5841889 + 61559716 = 2417^2 + 7846^2 .

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 67401605 - 2² = 67401601 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 (67401601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181982 + ... + 182351.

It is an arithmetic number, because the mean of its divisors is an integer number (10383519).

Almost surely, 2^67401605 is an apocalyptic number.

It is an amenable number.

67401605 is a deficient number, since it is larger than the sum of its proper divisors (15666547).

67401605 is a wasteful number, since it uses less digits than its factorization.

67401605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364375.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 67401605 is about 8209.8480497510. The cubic root of 67401605 is about 406.9647054496.

The spelling of 67401605 in words is "sixty-seven million, four hundred one thousand, six hundred five".