67020071 has 4 divisors (see below), whose sum is σ = 67073592. Its totient is φ = 66966552.

The previous prime is 67020053. The next prime is 67020077. The reversal of 67020071 is 17002076.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67020071 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 (67020077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24836 + ... + 27401.

It is an arithmetic number, because the mean of its divisors is an integer number (16768398).

Almost surely, 2^67020071 is an apocalyptic number.

67020071 is a deficient number, since it is larger than the sum of its proper divisors (53521).

67020071 is a wasteful number, since it uses less digits than its factorization.

67020071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53520.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 67020071 is about 8186.5787115253. The cubic root of 67020071 is about 406.1953628770.

The spelling of 67020071 in words is "sixty-seven million, twenty thousand, seventy-one".