66506067 has 12 divisors (see below), whose sum is σ = 99163584. Its totient is φ = 42906960.

The previous prime is 66506053. The next prime is 66506093. The reversal of 66506067 is 76060566.

It is not a de Polignac number, because 66506067 - 2¹¹ = 66504019 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66506017) 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 11 ways as a sum of consecutive naturals, for example, 118908 + ... + 119465.

It is an arithmetic number, because the mean of its divisors is an integer number (8263632).

Almost surely, 2^66506067 is an apocalyptic number.

66506067 is a deficient number, since it is larger than the sum of its proper divisors (32657517).

66506067 is a wasteful number, since it uses less digits than its factorization.

66506067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238410 (or 238407 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 66506067 is about 8155.1251983032. The cubic root of 66506067 is about 405.1542713606.

The spelling of 66506067 in words is "sixty-six million, five hundred six thousand, sixty-seven".