66606065 has 8 divisors (see below), whose sum is σ = 80232768. Its totient is φ = 53081200.

The previous prime is 66606061. The next prime is 66606121. The reversal of 66606065 is 56060666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66606065 - 2² = 66606061 is a prime.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24011 + ... + 26640.

It is an arithmetic number, because the mean of its divisors is an integer number (10029096).

Almost surely, 2^66606065 is an apocalyptic number.

It is an amenable number.

66606065 is a deficient number, since it is larger than the sum of its proper divisors (13626703).

66606065 is a wasteful number, since it uses less digits than its factorization.

66606065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50919.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 66606065 is about 8161.2538865054. The cubic root of 66606065 is about 405.3572319313.

The spelling of 66606065 in words is "sixty-six million, six hundred six thousand, sixty-five".