66214319 has 4 divisors (see below), whose sum is σ = 66399120. Its totient is φ = 66029520.

The previous prime is 66214307. The next prime is 66214321. The reversal of 66214319 is 91341266.

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

It is a cyclic number.

It is not a de Polignac number, because 66214319 - 2⁸ = 66214063 is a prime.

It is a super-2 number, since 2×66214319² = 8768672081267522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66204319) 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, 91862 + ... + 92579.

It is an arithmetic number, because the mean of its divisors is an integer number (16599780).

Almost surely, 2^66214319 is an apocalyptic number.

66214319 is a deficient number, since it is larger than the sum of its proper divisors (184801).

66214319 is a wasteful number, since it uses less digits than its factorization.

66214319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184800.

The product of its digits is 7776, while the sum is 32.

The square root of 66214319 is about 8137.2181364395. The cubic root of 66214319 is about 404.5609610060.

The spelling of 66214319 in words is "sixty-six million, two hundred fourteen thousand, three hundred nineteen".