66670117 has 4 divisors (see below), whose sum is σ = 66713920. Its totient is φ = 66626316.

The previous prime is 66670103. The next prime is 66670139. The reversal of 66670117 is 71107666.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66670117 - 2¹⁵ = 66637349 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 (66670147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19533 + ... + 22690.

It is an arithmetic number, because the mean of its divisors is an integer number (16678480).

Almost surely, 2^66670117 is an apocalyptic number.

It is an amenable number.

66670117 is a deficient number, since it is larger than the sum of its proper divisors (43803).

66670117 is a wasteful number, since it uses less digits than its factorization.

66670117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43802.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 66670117 is about 8165.1770954462. The cubic root of 66670117 is about 405.4871281256.

The spelling of 66670117 in words is "sixty-six million, six hundred seventy thousand, one hundred seventeen".