66875607 has 6 divisors (see below), whose sum is σ = 96598112. Its totient is φ = 44583732.

The previous prime is 66875561. The next prime is 66875609. The reversal of 66875607 is 70657866.

66875607 is a `hidden beast` number, since 6 + 6 + 87 + 560 + 7 = 666.

It is not a de Polignac number, because 66875607 - 2⁸ = 66875351 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 (66875609) 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, 3715303 + ... + 3715320.

Almost surely, 2^66875607 is an apocalyptic number.

66875607 is a deficient number, since it is larger than the sum of its proper divisors (29722505).

66875607 is a wasteful number, since it uses less digits than its factorization.

66875607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7430629 (or 7430626 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 66875607 is about 8177.7507298768. The cubic root of 66875607 is about 405.9032970363.

The spelling of 66875607 in words is "sixty-six million, eight hundred seventy-five thousand, six hundred seven".