66303981106644 has 48 divisors (see below), whose sum is σ = 155840867715456. Its totient is φ = 21939677760000.

The previous prime is 66303981106633. The next prime is 66303981106651. The reversal of 66303981106644 is 44660118930366.

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, 126904344 + ... + 127425744.

It is an arithmetic number, because the mean of its divisors is an integer number (3246684744072).

Almost surely, 2^{66303981106644} is an apocalyptic number.

It is an amenable number.

66303981106644 is an abundant number, since it is smaller than the sum of its proper divisors (89536886608812).

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

66303981106644 is a wasteful number, since it uses less digits than its factorization.

66303981106644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598896 (or 598894 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 57.

The spelling of 66303981106644 in words is "sixty-six trillion, three hundred three billion, nine hundred eighty-one million, one hundred six thousand, six hundred forty-four".