66019486645 has 16 divisors (see below), whose sum is σ = 91041245568. Its totient is φ = 45020387520.

The previous prime is 66019486639. The next prime is 66019486681. The reversal of 66019486645 is 54668491066.

It is not a de Polignac number, because 66019486645 - 2¹³ = 66019478453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5204359 + ... + 5217028.

It is an arithmetic number, because the mean of its divisors is an integer number (5690077848).

Almost surely, 2^66019486645 is an apocalyptic number.

It is an amenable number.

66019486645 is a deficient number, since it is larger than the sum of its proper divisors (25021758923).

66019486645 is a wasteful number, since it uses less digits than its factorization.

66019486645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10421580.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 66019486645 in words is "sixty-six billion, nineteen million, four hundred eighty-six thousand, six hundred forty-five".