66798017 has 8 divisors (see below), whose sum is σ = 78476160. Its totient is φ = 56054160.

The previous prime is 66798001. The next prime is 66798023. The reversal of 66798017 is 71089766.

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 66798017 - 2⁴ = 66798001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66798097) 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, 233417 + ... + 233702.

It is an arithmetic number, because the mean of its divisors is an integer number (9809520).

Almost surely, 2^66798017 is an apocalyptic number.

It is an amenable number.

66798017 is a deficient number, since it is larger than the sum of its proper divisors (11678143).

66798017 is a wasteful number, since it uses less digits than its factorization.

66798017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467143.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 66798017 is about 8173.0053835783. The cubic root of 66798017 is about 405.7462580898.

The spelling of 66798017 in words is "sixty-six million, seven hundred ninety-eight thousand, seventeen".