66610117 has 8 divisors (see below), whose sum is σ = 77982912. Its totient is φ = 55701600.

The previous prime is 66610111. The next prime is 66610123. The reversal of 66610117 is 71101666.

It is an interprime number because it is at equal distance from previous prime (66610111) and next prime (66610123).

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 66610117 - 2⁷ = 66609989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66610111) 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, 115759 + ... + 116332.

It is an arithmetic number, because the mean of its divisors is an integer number (9747864).

Almost surely, 2^66610117 is an apocalyptic number.

It is an amenable number.

66610117 is a deficient number, since it is larger than the sum of its proper divisors (11372795).

66610117 is a wasteful number, since it uses less digits than its factorization.

66610117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232139.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 66610117 is about 8161.5021288976. The cubic root of 66610117 is about 405.3654517744.

The spelling of 66610117 in words is "sixty-six million, six hundred ten thousand, one hundred seventeen".