66021367 has 2 divisors, whose sum is σ = 66021368. Its totient is φ = 66021366.

The previous prime is 66021359. The next prime is 66021391. The reversal of 66021367 is 76312066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66021367 - 2³ = 66021359 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66021317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33010683 + 33010684.

It is an arithmetic number, because the mean of its divisors is an integer number (33010684).

Almost surely, 2^66021367 is an apocalyptic number.

66021367 is a deficient number, since it is larger than the sum of its proper divisors (1).

66021367 is an equidigital number, since it uses as much as digits as its factorization.

66021367 is an odious number, because the sum of its binary digits is odd.

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

The square root of 66021367 is about 8125.3533461629. The cubic root of 66021367 is about 404.1676080516.

The spelling of 66021367 in words is "sixty-six million, twenty-one thousand, three hundred sixty-seven".