66645319149 has 24 divisors (see below), whose sum is σ = 100906757952. Its totient is φ = 42338479680.

The previous prime is 66645319141. The next prime is 66645319187. The reversal of 66645319149 is 94191354666.

It is a happy number.

It is not a de Polignac number, because 66645319149 - 2³ = 66645319141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66645319095 and 66645319104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66645319141) 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 23 ways as a sum of consecutive naturals, for example, 2084257 + ... + 2115990.

It is an arithmetic number, because the mean of its divisors is an integer number (4204448248).

Almost surely, 2^66645319149 is an apocalyptic number.

It is an amenable number.

66645319149 is a deficient number, since it is larger than the sum of its proper divisors (34261438803).

66645319149 is a wasteful number, since it uses less digits than its factorization.

66645319149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200337 (or 4200334 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The spelling of 66645319149 in words is "sixty-six billion, six hundred forty-five million, three hundred nineteen thousand, one hundred forty-nine".