66704111 has 4 divisors (see below), whose sum is σ = 67072824. Its totient is φ = 66335400.

The previous prime is 66704101. The next prime is 66704149. The reversal of 66704111 is 11140766.

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 66704111 - 2⁶ = 66704047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66704101) 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 in 3 ways as a sum of consecutive naturals, for example, 184085 + ... + 184446.

It is an arithmetic number, because the mean of its divisors is an integer number (16768206).

Almost surely, 2^66704111 is an apocalyptic number.

66704111 is a deficient number, since it is larger than the sum of its proper divisors (368713).

66704111 is a wasteful number, since it uses less digits than its factorization.

66704111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368712.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 66704111 is about 8167.2584751555. The cubic root of 66704111 is about 405.5560334961.

Adding to 66704111 its reverse (11140766), we get a palindrome (77844877).

The spelling of 66704111 in words is "sixty-six million, seven hundred four thousand, one hundred eleven".