66098517 has 4 divisors (see below), whose sum is σ = 88131360. Its totient is φ = 44065676.

The previous prime is 66098509. The next prime is 66098521. The reversal of 66098517 is 71589066.

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 66098517 - 2³ = 66098509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66098537) 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, 11016417 + ... + 11016422.

It is an arithmetic number, because the mean of its divisors is an integer number (22032840).

Almost surely, 2^66098517 is an apocalyptic number.

It is an amenable number.

66098517 is a deficient number, since it is larger than the sum of its proper divisors (22032843).

66098517 is a wasteful number, since it uses less digits than its factorization.

66098517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22032842.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 66098517 is about 8130.0994458863. The cubic root of 66098517 is about 404.3249782809.

The spelling of 66098517 in words is "sixty-six million, ninety-eight thousand, five hundred seventeen".