66601350874944 has 112 divisors (see below), whose sum is σ = 206100671668800. Its totient is φ = 21032005529088.

The previous prime is 66601350874909. The next prime is 66601350874979. The reversal of 66601350874944 is 44947805310666.

It is an interprime number because it is at equal distance from previous prime (66601350874909) and next prime (66601350874979).

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, 1014242127 + ... + 1014307790.

Almost surely, 2^{66601350874944} is an apocalyptic number.

66601350874944 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66601350874944 is an abundant number, since it is smaller than the sum of its proper divisors (139499320793856).

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

66601350874944 is a wasteful number, since it uses less digits than its factorization.

66601350874944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028549957 (or 2028549941 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 63.

The spelling of 66601350874944 in words is "sixty-six trillion, six hundred one billion, three hundred fifty million, eight hundred seventy-four thousand, nine hundred forty-four".