66714451 has 2 divisors, whose sum is σ = 66714452. Its totient is φ = 66714450.

The previous prime is 66714397. The next prime is 66714493. The reversal of 66714451 is 15441766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66714451 - 2⁹ = 66713939 is a prime.

It is not a weakly prime, because it can be changed into another prime (66714251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33357225 + 33357226.

It is an arithmetic number, because the mean of its divisors is an integer number (33357226).

Almost surely, 2^66714451 is an apocalyptic number.

66714451 is a deficient number, since it is larger than the sum of its proper divisors (1).

66714451 is an equidigital number, since it uses as much as digits as its factorization.

66714451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 66714451 is about 8167.8914659782. The cubic root of 66714451 is about 405.5769878904.

The spelling of 66714451 in words is "sixty-six million, seven hundred fourteen thousand, four hundred fifty-one".