66716000569 has 8 divisors (see below), whose sum is σ = 70251066080. Its totient is φ = 63183304800.

The previous prime is 66716000543. The next prime is 66716000609. The reversal of 66716000569 is 96500061766.

66716000569 = T₂₁₀₈₉₅ + T₂₁₀₈₉₆ + T₂₁₀₈₉₇.

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

It is a cyclic number.

It is not a de Polignac number, because 66716000569 - 2⁵ = 66716000537 is a prime.

It is a super-2 number, since 2×66716000569² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66716000369) 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 7 ways as a sum of consecutive naturals, for example, 534492 + ... + 647389.

It is an arithmetic number, because the mean of its divisors is an integer number (8781383260).

Almost surely, 2^66716000569 is an apocalyptic number.

66716000569 is the 210897-th centered triangular number.

It is an amenable number.

66716000569 is a deficient number, since it is larger than the sum of its proper divisors (3535065511).

66716000569 is a wasteful number, since it uses less digits than its factorization.

66716000569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184871.

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 66716000569 in words is "sixty-six billion, seven hundred sixteen million, five hundred sixty-nine", and thus it is an aban number.