67720601 has 8 divisors (see below), whose sum is σ = 73653384. Its totient is φ = 61891200.

The previous prime is 67720573. The next prime is 67720633. The reversal of 67720601 is 10602776.

It can be written as a sum of positive squares in 4 ways, for example, as 15808576 + 51912025 = 3976^2 + 7205^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67720601 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 (67720651) 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, 24476 + ... + 27101.

It is an arithmetic number, because the mean of its divisors is an integer number (9206673).

Almost surely, 2^67720601 is an apocalyptic number.

It is an amenable number.

67720601 is a deficient number, since it is larger than the sum of its proper divisors (5932783).

67720601 is a wasteful number, since it uses less digits than its factorization.

67720601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51691.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 67720601 is about 8229.2527607311. The cubic root of 67720601 is about 407.6057181141.

The spelling of 67720601 in words is "sixty-seven million, seven hundred twenty thousand, six hundred one".