66067066571065 has 16 divisors (see below), whose sum is σ = 90606412420992. Its totient is φ = 45303056515584.

The previous prime is 66067066570997. The next prime is 66067066571101. The reversal of 66067066571065 is 56017566076066.

It is a happy number.

It is not a de Polignac number, because 66067066571065 - 2⁷ = 66067066570937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66067066570994 and 66067066571012.

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 15 ways as a sum of consecutive naturals, for example, 27616602 + ... + 29913388.

It is an arithmetic number, because the mean of its divisors is an integer number (5662900776312).

Almost surely, 2^{66067066571065} is an apocalyptic number.

It is an amenable number.

66067066571065 is a deficient number, since it is larger than the sum of its proper divisors (24539345849927).

66067066571065 is a wasteful number, since it uses less digits than its factorization.

66067066571065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3118656.

The product of its (nonzero) digits is 57153600, while the sum is 61.

The spelling of 66067066571065 in words is "sixty-six trillion, sixty-seven billion, sixty-six million, five hundred seventy-one thousand, sixty-five".