66923194448 has 40 divisors (see below), whose sum is σ = 148896109920. Its totient is φ = 28818599040.

The previous prime is 66923194441. The next prime is 66923194529. The reversal of 66923194448 is 84449132966.

It is a super-3 number, since 3×66923194448³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66923194393 and 66923194402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66923194441) 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 7 ways as a sum of consecutive naturals, for example, 10003115 + ... + 10009802.

It is an arithmetic number, because the mean of its divisors is an integer number (3722402748).

Almost surely, 2^66923194448 is an apocalyptic number.

It is an amenable number.

66923194448 is an abundant number, since it is smaller than the sum of its proper divisors (81972915472).

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

66923194448 is a wasteful number, since it uses less digits than its factorization.

66923194448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20012955 (or 20012949 counting only the distinct ones).

The product of its digits is 8957952, while the sum is 56.

The spelling of 66923194448 in words is "sixty-six billion, nine hundred twenty-three million, one hundred ninety-four thousand, four hundred forty-eight".