66161156700 has 36 divisors (see below), whose sum is σ = 191426280920. Its totient is φ = 17642975040.

The previous prime is 66161156689. The next prime is 66161156707. The reversal of 66161156700 is 765116166.

66161156700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66161156707) 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, 110268295 + ... + 110268894.

Almost surely, 2^66161156700 is an apocalyptic number.

66161156700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66161156700 is an abundant number, since it is smaller than the sum of its proper divisors (125265124220).

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

66161156700 is a wasteful number, since it uses less digits than its factorization.

66161156700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220537206 (or 220537199 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The spelling of 66161156700 in words is "sixty-six billion, one hundred sixty-one million, one hundred fifty-six thousand, seven hundred".