66560417 has 16 divisors (see below), whose sum is σ = 83208192. Its totient is φ = 51725520.

The previous prime is 66560407. The next prime is 66560419. The reversal of 66560417 is 71406566.

It is not a de Polignac number, because 66560417 - 2⁶ = 66560353 is a prime.

It is a super-2 number, since 2×66560417² = 8860578222427778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66560419) 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, 34718 + ... + 36584.

It is an arithmetic number, because the mean of its divisors is an integer number (5200512).

Almost surely, 2^66560417 is an apocalyptic number.

It is an amenable number.

66560417 is a deficient number, since it is larger than the sum of its proper divisors (16647775).

66560417 is a wasteful number, since it uses less digits than its factorization.

66560417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 66560417 is about 8158.4567780923. The cubic root of 66560417 is about 405.2646078554.

The spelling of 66560417 in words is "sixty-six million, five hundred sixty thousand, four hundred seventeen".