66554117 has 8 divisors (see below), whose sum is σ = 78515712. Its totient is φ = 55206000.

The previous prime is 66554113. The next prime is 66554119. The reversal of 66554117 is 71145566.

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 66554117 - 2² = 66554113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66554113) 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, 153134 + ... + 153567.

It is an arithmetic number, because the mean of its divisors is an integer number (9814464).

Almost surely, 2^66554117 is an apocalyptic number.

It is an amenable number.

66554117 is a deficient number, since it is larger than the sum of its proper divisors (11961595).

66554117 is a wasteful number, since it uses less digits than its factorization.

66554117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306739.

The product of its digits is 25200, while the sum is 35.

The square root of 66554117 is about 8158.0706665240. The cubic root of 66554117 is about 405.2518212388.

The spelling of 66554117 in words is "sixty-six million, five hundred fifty-four thousand, one hundred seventeen".