66964730519 has 8 divisors (see below), whose sum is σ = 71027278080. Its totient is φ = 62955991800.

The previous prime is 66964730513. The next prime is 66964730527. The reversal of 66964730519 is 91503746966.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66964730519 is a prime.

It is a super-2 number, since 2×66964730519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66964730513) 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, 13449647 + ... + 13454624.

It is an arithmetic number, because the mean of its divisors is an integer number (8878409760).

Almost surely, 2^66964730519 is an apocalyptic number.

66964730519 is a deficient number, since it is larger than the sum of its proper divisors (4062547561).

66964730519 is a wasteful number, since it uses less digits than its factorization.

66964730519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26904421.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 66964730519 in words is "sixty-six billion, nine hundred sixty-four million, seven hundred thirty thousand, five hundred nineteen".