66155626152 has 768 divisors, whose sum is σ = 245988288000. Its totient is φ = 16094453760.

The previous prime is 66155626129. The next prime is 66155626213. The reversal of 66155626152 is 25162655166.

66155626152 is a `hidden beast` number, since 6 + 6 + 1 + 5 + 5 + 626 + 15 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 66155626098 and 66155626107.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 196307328 + ... + 196307664.

It is an arithmetic number, because the mean of its divisors is an integer number (320297250).

Almost surely, 2^66155626152 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 66155626152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122994144000).

66155626152 is an abundant number, since it is smaller than the sum of its proper divisors (179832661848).

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

66155626152 is a wasteful number, since it uses less digits than its factorization.

66155626152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 426 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The spelling of 66155626152 in words is "sixty-six billion, one hundred fifty-five million, six hundred twenty-six thousand, one hundred fifty-two".