66704107 has 4 divisors (see below), whose sum is σ = 70627896. Its totient is φ = 62780320.

The previous prime is 66704101. The next prime is 66704149. The reversal of 66704107 is 70140766.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70140766 = 2 ⋅35070383.

It is a de Polignac number, because none of the positive numbers 2^k-66704107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66704101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1961869 + ... + 1961902.

It is an arithmetic number, because the mean of its divisors is an integer number (17656974).

Almost surely, 2^66704107 is an apocalyptic number.

66704107 is a deficient number, since it is larger than the sum of its proper divisors (3923789).

66704107 is a wasteful number, since it uses less digits than its factorization.

66704107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923788.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 66704107 is about 8167.2582302753. The cubic root of 66704107 is about 405.5560253895.

The spelling of 66704107 in words is "sixty-six million, seven hundred four thousand, one hundred seven".