66061165 has 8 divisors (see below), whose sum is σ = 79365888. Its totient is φ = 52787280.

The previous prime is 66061153. The next prime is 66061183. The reversal of 66061165 is 56116066.

66061165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 66061165 - 2¹⁵ = 66028397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2697 + ... + 11806.

It is an arithmetic number, because the mean of its divisors is an integer number (9920736).

Almost surely, 2^66061165 is an apocalyptic number.

It is an amenable number.

66061165 is a deficient number, since it is larger than the sum of its proper divisors (13304723).

66061165 is a wasteful number, since it uses less digits than its factorization.

66061165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15419.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 66061165 is about 8127.8019783949. The cubic root of 66061165 is about 404.2488031365.

The spelling of 66061165 in words is "sixty-six million, sixty-one thousand, one hundred sixty-five".