66449553356 has 12 divisors (see below), whose sum is σ = 116773275360. Its totient is φ = 33085760400.

The previous prime is 66449553353. The next prime is 66449553367. The reversal of 66449553356 is 65335594466.

It is not an unprimeable number, because it can be changed into a prime (66449553353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34752995 + ... + 34754906.

It is an arithmetic number, because the mean of its divisors is an integer number (9731106280).

Almost surely, 2^66449553356 is an apocalyptic number.

It is an amenable number.

66449553356 is a deficient number, since it is larger than the sum of its proper divisors (50323722004).

66449553356 is a wasteful number, since it uses less digits than its factorization.

66449553356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69508144 (or 69508142 counting only the distinct ones).

The product of its digits is 34992000, while the sum is 56.

The spelling of 66449553356 in words is "sixty-six billion, four hundred forty-nine million, five hundred fifty-three thousand, three hundred fifty-six".