66005831404 has 6 divisors (see below), whose sum is σ = 115510204964. Its totient is φ = 33002915700.

The previous prime is 66005831347. The next prime is 66005831417. The reversal of 66005831404 is 40413850066.

It is a happy number.

It is a super-2 number, since 2×66005831404² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8250728922 + ... + 8250728929.

Almost surely, 2^66005831404 is an apocalyptic number.

It is an amenable number.

66005831404 is a deficient number, since it is larger than the sum of its proper divisors (49504373560).

66005831404 is a wasteful number, since it uses less digits than its factorization.

66005831404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16501457855 (or 16501457853 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 66005831404 in words is "sixty-six billion, five million, eight hundred thirty-one thousand, four hundred four".