66254169 has 8 divisors (see below), whose sum is σ = 89403552. Its totient is φ = 43637120.

The previous prime is 66254141. The next prime is 66254189. The reversal of 66254169 is 96145266.

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 66254169 - 2¹² = 66250073 is a prime.

It is a super-2 number, since 2×66254169² = 8779229819761122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66254189) 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, 132792 + ... + 133289.

It is an arithmetic number, because the mean of its divisors is an integer number (11175444).

Almost surely, 2^66254169 is an apocalyptic number.

It is an amenable number.

66254169 is a deficient number, since it is larger than the sum of its proper divisors (23149383).

66254169 is a wasteful number, since it uses less digits than its factorization.

66254169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266167.

The product of its digits is 77760, while the sum is 39.

The square root of 66254169 is about 8139.6663936552. Note that the first 3 decimals coincide. The cubic root of 66254169 is about 404.6421041858.

The spelling of 66254169 in words is "sixty-six million, two hundred fifty-four thousand, one hundred sixty-nine".