66693598449 has 8 divisors (see below), whose sum is σ = 89163203712. Its totient is φ = 44343196080.

The previous prime is 66693598427. The next prime is 66693598457. The reversal of 66693598449 is 94489539666.

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

It is not a de Polignac number, because 66693598449 - 2²³ = 66685209841 is a prime.

It is a super-3 number, since 3×66693598449³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66693598469) 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, 29799417 + ... + 29801654.

It is an arithmetic number, because the mean of its divisors is an integer number (11145400464).

Almost surely, 2^66693598449 is an apocalyptic number.

It is an amenable number.

66693598449 is a deficient number, since it is larger than the sum of its proper divisors (22469605263).

66693598449 is a wasteful number, since it uses less digits than its factorization.

66693598449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59601447.

The product of its digits is 302330880, while the sum is 69.

The spelling of 66693598449 in words is "sixty-six billion, six hundred ninety-three million, five hundred ninety-eight thousand, four hundred forty-nine".