66669169 has 8 divisors (see below), whose sum is σ = 77112000. Its totient is φ = 56456016.

The previous prime is 66669151. The next prime is 66669181. The reversal of 66669169 is 96196666.

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 66669169 - 2⁵ = 66669137 is a prime.

It is a super-2 number, since 2×66669169² = 8889556190301122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66669199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56794 + ... + 57955.

It is an arithmetic number, because the mean of its divisors is an integer number (9639000).

Almost surely, 2^66669169 is an apocalyptic number.

It is an amenable number.

66669169 is a deficient number, since it is larger than the sum of its proper divisors (10442831).

66669169 is a wasteful number, since it uses less digits than its factorization.

66669169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114839.

The product of its digits is 629856, while the sum is 49.

The square root of 66669169 is about 8165.1190438352. The cubic root of 66669169 is about 405.4852062070.

The spelling of 66669169 in words is "sixty-six million, six hundred sixty-nine thousand, one hundred sixty-nine".