66006867 has 4 divisors (see below), whose sum is σ = 88009160. Its totient is φ = 44004576.

The previous prime is 66006827. The next prime is 66006877. The reversal of 66006867 is 76860066.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 66006867 - 2⁷ = 66006739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66006827) 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, 11001142 + ... + 11001147.

It is an arithmetic number, because the mean of its divisors is an integer number (22002290).

Almost surely, 2^66006867 is an apocalyptic number.

66006867 is a deficient number, since it is larger than the sum of its proper divisors (22002293).

66006867 is a wasteful number, since it uses less digits than its factorization.

66006867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22002292.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 66006867 is about 8124.4610282775. The cubic root of 66006867 is about 404.1380173313.

The spelling of 66006867 in words is "sixty-six million, six thousand, eight hundred sixty-seven".