66156706600 has 48 divisors (see below), whose sum is σ = 155980775520. Its totient is φ = 26089963200.

The previous prime is 66156706543. The next prime is 66156706607. The reversal of 66156706600 is 660765166.

It is not an unprimeable number, because it can be changed into a prime (66156706607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2315262 + ... + 2343661.

It is an arithmetic number, because the mean of its divisors is an integer number (3249599490).

Almost surely, 2^66156706600 is an apocalyptic number.

It is an amenable number.

66156706600 is an abundant number, since it is smaller than the sum of its proper divisors (89824068920).

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

66156706600 is a wasteful number, since it uses less digits than its factorization.

66156706600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659010 (or 4659001 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 66156706600 in words is "sixty-six billion, one hundred fifty-six million, seven hundred six thousand, six hundred".