66744869490 has 96 divisors (see below), whose sum is σ = 187214803776. Its totient is φ = 16400568960.

The previous prime is 66744869483. The next prime is 66744869531. The reversal of 66744869490 is 9496844766.

66744869490 is a `hidden beast` number, since 6 + 67 + 4 + 4 + 86 + 9 + 490 = 666.

It is a Curzon number.

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 47 ways as a sum of consecutive naturals, for example, 618117 + ... + 718023.

It is an arithmetic number, because the mean of its divisors is an integer number (1950154206).

Almost surely, 2^66744869490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66744869490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93607401888).

66744869490 is an abundant number, since it is smaller than the sum of its proper divisors (120469934286).

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

66744869490 is a wasteful number, since it uses less digits than its factorization.

66744869490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100504 (or 100501 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 66744869490 in words is "sixty-six billion, seven hundred forty-four million, eight hundred sixty-nine thousand, four hundred ninety".