66150889776 has 240 divisors, whose sum is σ = 195165446112. Its totient is φ = 20895436800.

The previous prime is 66150889723. The next prime is 66150889781. The reversal of 66150889776 is 67798805166.

66150889776 is a `hidden beast` number, since 6 + 615 + 0 + 8 + 8 + 9 + 7 + 7 + 6 = 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, 29890846 + ... + 29893058.

Almost surely, 2^66150889776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66150889776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97582723056).

66150889776 is an abundant number, since it is smaller than the sum of its proper divisors (129014556336).

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

66150889776 is a wasteful number, since it uses less digits than its factorization.

66150889776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 63.

The spelling of 66150889776 in words is "sixty-six billion, one hundred fifty million, eight hundred eighty-nine thousand, seven hundred seventy-six".