66621444096 has 52 divisors (see below), whose sum is σ = 177635530352. Its totient is φ = 22207143936.

The previous prime is 66621444089. The next prime is 66621444107. The reversal of 66621444096 is 69044412666.

It is a super-3 number, since 3×66621444096³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698546 + ... + 2723121.

Almost surely, 2^66621444096 is an apocalyptic number.

It is an amenable number.

66621444096 is an abundant number, since it is smaller than the sum of its proper divisors (111014086256).

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

66621444096 is an equidigital number, since it uses as much as digits as its factorization.

66621444096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5421694 (or 5421672 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 66621444096 in words is "sixty-six billion, six hundred twenty-one million, four hundred forty-four thousand, ninety-six".