66746042920 has 16 divisors (see below), whose sum is σ = 150178596660. Its totient is φ = 26698417152.

The previous prime is 66746042899. The next prime is 66746042933. The reversal of 66746042920 is 2924064766.

It can be written as a sum of positive squares in 2 ways, for example, as 66371155876 + 374887044 = 257626^2 + 19362^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 834325497 + ... + 834325576.

Almost surely, 2^66746042920 is an apocalyptic number.

It is an amenable number.

66746042920 is an abundant number, since it is smaller than the sum of its proper divisors (83432553740).

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

66746042920 is a wasteful number, since it uses less digits than its factorization.

66746042920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668651084 (or 1668651080 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 46.

The spelling of 66746042920 in words is "sixty-six billion, seven hundred forty-six million, forty-two thousand, nine hundred twenty".