666070657169 has 8 divisors (see below), whose sum is σ = 681681147840. Its totient is φ = 650465642736.

The previous prime is 666070657157. The next prime is 666070657171. The reversal of 666070657169 is 961756070666.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-666070657169 is a prime.

It is a super-2 number, since 2×666070657169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666070657129) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1122437 + ... + 1609970.

It is an arithmetic number, because the mean of its divisors is an integer number (85210143480).

Almost surely, 2^666070657169 is an apocalyptic number.

It is an amenable number.

666070657169 is a deficient number, since it is larger than the sum of its proper divisors (15610490671).

666070657169 is a wasteful number, since it uses less digits than its factorization.

666070657169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738119.

The product of its (nonzero) digits is 17146080, while the sum is 59.

The spelling of 666070657169 in words is "six hundred sixty-six billion, seventy million, six hundred fifty-seven thousand, one hundred sixty-nine".