66009040819 has 8 divisors (see below), whose sum is σ = 67418104320. Its totient is φ = 64600169736.

The previous prime is 66009040813. The next prime is 66009040843. The reversal of 66009040819 is 91804090066.

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

It is a cyclic number.

It is not a de Polignac number, because 66009040819 - 2²⁹ = 65472169907 is a prime.

It is a super-2 number, since 2×66009040819² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66009040813) 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, 804972 + ... + 883174.

It is an arithmetic number, because the mean of its divisors is an integer number (8427263040).

Almost surely, 2^66009040819 is an apocalyptic number.

66009040819 is a deficient number, since it is larger than the sum of its proper divisors (1409063501).

66009040819 is a wasteful number, since it uses less digits than its factorization.

66009040819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96209.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 66009040819 in words is "sixty-six billion, nine million, forty thousand, eight hundred nineteen".