66168849 has 16 divisors (see below), whose sum is σ = 95866880. Its totient is φ = 40441680.

The previous prime is 66168833. The next prime is 66168877. The reversal of 66168849 is 94886166.

It is not a de Polignac number, because 66168849 - 2⁴ = 66168833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66168798 and 66168807.

It is not an unprimeable number, because it can be changed into a prime (66168829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16957 + ... + 20490.

It is an arithmetic number, because the mean of its divisors is an integer number (5991680).

Almost surely, 2^66168849 is an apocalyptic number.

It is an amenable number.

66168849 is a deficient number, since it is larger than the sum of its proper divisors (29698031).

66168849 is a wasteful number, since it uses less digits than its factorization.

66168849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37500.

The product of its digits is 497664, while the sum is 48.

The square root of 66168849 is about 8134.4237042338. The cubic root of 66168849 is about 404.4683345190.

The spelling of 66168849 in words is "sixty-six million, one hundred sixty-eight thousand, eight hundred forty-nine".