66060065 has 4 divisors (see below), whose sum is σ = 79272084. Its totient is φ = 52848048.

The previous prime is 66060053. The next prime is 66060103. The reversal of 66060065 is 56006066.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37405456 + 28654609 = 6116^2 + 5353^2 .

It is a cyclic number.

It is not a de Polignac number, because 66060065 - 2⁸ = 66059809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6606002 + ... + 6606011.

It is an arithmetic number, because the mean of its divisors is an integer number (19818021).

Almost surely, 2^66060065 is an apocalyptic number.

It is an amenable number.

66060065 is a deficient number, since it is larger than the sum of its proper divisors (13212019).

66060065 is a wasteful number, since it uses less digits than its factorization.

66060065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13212018.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 66060065 is about 8127.7343091418. The cubic root of 66060065 is about 404.2465593767.

The spelling of 66060065 in words is "sixty-six million, sixty thousand, sixty-five".