66707675 has 6 divisors (see below), whose sum is σ = 82717548. Its totient is φ = 53366120.

The previous prime is 66707671. The next prime is 66707687. The reversal of 66707675 is 57670766.

It is a happy number.

It is not a de Polignac number, because 66707675 - 2² = 66707671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66707671) 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 5 ways as a sum of consecutive naturals, for example, 1334129 + ... + 1334178.

It is an arithmetic number, because the mean of its divisors is an integer number (13786258).

Almost surely, 2^66707675 is an apocalyptic number.

66707675 is a deficient number, since it is larger than the sum of its proper divisors (16009873).

66707675 is a wasteful number, since it uses less digits than its factorization.

66707675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2668317 (or 2668312 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 44.

The square root of 66707675 is about 8167.4766605115. The cubic root of 66707675 is about 405.5632563191.

The spelling of 66707675 in words is "sixty-six million, seven hundred seven thousand, six hundred seventy-five".