67066321 has 16 divisors (see below), whose sum is σ = 81690624. Its totient is φ = 53810064.

The previous prime is 67066313. The next prime is 67066327. The reversal of 67066321 is 12366076.

It is not a de Polignac number, because 67066321 - 2³ = 67066313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67066327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3136 + ... + 11998.

It is an arithmetic number, because the mean of its divisors is an integer number (5105664).

Almost surely, 2^67066321 is an apocalyptic number.

It is an amenable number.

67066321 is a deficient number, since it is larger than the sum of its proper divisors (14624303).

67066321 is a wasteful number, since it uses less digits than its factorization.

67066321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8940.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 67066321 is about 8189.4029696920. The cubic root of 67066321 is about 406.2887787519.

The spelling of 67066321 in words is "sixty-seven million, sixty-six thousand, three hundred twenty-one".