67720533 has 16 divisors (see below), whose sum is σ = 94763520. Its totient is φ = 42935024.

The previous prime is 67720531. The next prime is 67720547. The reversal of 67720533 is 33502776.

It is a cyclic number.

It is not a de Polignac number, because 67720533 - 2¹ = 67720531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67720494 and 67720503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67720531) 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 15 ways as a sum of consecutive naturals, for example, 9610 + ... + 15092.

It is an arithmetic number, because the mean of its divisors is an integer number (5922720).

Almost surely, 2^67720533 is an apocalyptic number.

It is an amenable number.

67720533 is a deficient number, since it is larger than the sum of its proper divisors (27042987).

67720533 is a wasteful number, since it uses less digits than its factorization.

67720533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5688.

The product of its (nonzero) digits is 26460, while the sum is 33.

The square root of 67720533 is about 8229.2486291277. The cubic root of 67720533 is about 407.6055816849.

It can be divided in two parts, 67 and 720533, that added together give a triangular number (720600 = T₁₂₀₀).

The spelling of 67720533 in words is "sixty-seven million, seven hundred twenty thousand, five hundred thirty-three".