66513417 has 8 divisors (see below), whose sum is σ = 88812480. Its totient is φ = 44278320.

The previous prime is 66513373. The next prime is 66513479. The reversal of 66513417 is 71431566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66513417 - 2¹⁰ = 66512393 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66513487) 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, 13509 + ... + 17762.

It is an arithmetic number, because the mean of its divisors is an integer number (11101560).

Almost surely, 2^66513417 is an apocalyptic number.

It is an amenable number.

66513417 is a deficient number, since it is larger than the sum of its proper divisors (22299063).

66513417 is a wasteful number, since it uses less digits than its factorization.

66513417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31983.

The product of its digits is 15120, while the sum is 33.

The square root of 66513417 is about 8155.5758227117. The cubic root of 66513417 is about 405.1691961854.

The spelling of 66513417 in words is "sixty-six million, five hundred thirteen thousand, four hundred seventeen".