66150938640384 has 816 divisors, whose sum is σ = 213279033187584. Its totient is φ = 19619905536000.

The previous prime is 66150938640373. The next prime is 66150938640499. The reversal of 66150938640384 is 48304683905166.

66150938640384 is a `hidden beast` number, since 6 + 6 + 1 + 50 + 93 + 86 + 40 + 384 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94366531234 + ... + 94366531934.

Almost surely, 2^{66150938640384} is an apocalyptic number.

66150938640384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66150938640384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106639516593792).

66150938640384 is an abundant number, since it is smaller than the sum of its proper divisors (147128094547200).

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

66150938640384 is a wasteful number, since it uses less digits than its factorization.

66150938640384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180 (or 1147 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 63.

The spelling of 66150938640384 in words is "sixty-six trillion, one hundred fifty billion, nine hundred thirty-eight million, six hundred forty thousand, three hundred eighty-four".