66606067 has 4 divisors (see below), whose sum is σ = 72661176. Its totient is φ = 60550960.

The previous prime is 66606061. The next prime is 66606121. The reversal of 66606067 is 76060666.

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

It is a cyclic number.

It is not a de Polignac number, because 66606067 - 2⁷ = 66605939 is a prime.

It is a super-2 number, since 2×66606067² = 8872736322416978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66606061) 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 3 ways as a sum of consecutive naturals, for example, 3027538 + ... + 3027559.

It is an arithmetic number, because the mean of its divisors is an integer number (18165294).

Almost surely, 2^66606067 is an apocalyptic number.

66606067 is a deficient number, since it is larger than the sum of its proper divisors (6055109).

66606067 is a wasteful number, since it uses less digits than its factorization.

66606067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6055108.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 66606067 is about 8161.2540090356. The cubic root of 66606067 is about 405.3572359886.

The spelling of 66606067 in words is "sixty-six million, six hundred six thousand, sixty-seven".