66400229192 has 16 divisors (see below), whose sum is σ = 135818650800. Its totient is φ = 30181922320.

The previous prime is 66400229191. The next prime is 66400229209. The reversal of 66400229192 is 29192200466.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66400229191) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 377273942 + ... + 377274117.

It is an arithmetic number, because the mean of its divisors is an integer number (8488665675).

Almost surely, 2^66400229192 is an apocalyptic number.

It is an amenable number.

66400229192 is an abundant number, since it is smaller than the sum of its proper divisors (69418421608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66400229192 is a wasteful number, since it uses less digits than its factorization.

66400229192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754548076 (or 754548072 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

It can be divided in two parts, 66400 and 229192, that added together give a palindrome (295592).

The spelling of 66400229192 in words is "sixty-six billion, four hundred million, two hundred twenty-nine thousand, one hundred ninety-two".