66019638291 has 8 divisors (see below), whose sum is σ = 88443370944. Its totient is φ = 43804498920.

The previous prime is 66019638287. The next prime is 66019638301. The reversal of 66019638291 is 19283691066.

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

It is not a de Polignac number, because 66019638291 - 2² = 66019638287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66019639291) 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, 52147581 + ... + 52148846.

It is an arithmetic number, because the mean of its divisors is an integer number (11055421368).

Almost surely, 2^66019638291 is an apocalyptic number.

66019638291 is a deficient number, since it is larger than the sum of its proper divisors (22423732653).

66019638291 is a wasteful number, since it uses less digits than its factorization.

66019638291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104296641.

The product of its (nonzero) digits is 839808, while the sum is 51.

The spelling of 66019638291 in words is "sixty-six billion, nineteen million, six hundred thirty-eight thousand, two hundred ninety-one".