66113161850 has 24 divisors (see below), whose sum is σ = 122978125920. Its totient is φ = 26443620720.

The previous prime is 66113161841. The next prime is 66113161853. The reversal of 66113161850 is 5816131166.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66113161853) 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, 1067021 + ... + 1127279.

It is an arithmetic number, because the mean of its divisors is an integer number (5124088580).

Almost surely, 2^66113161850 is an apocalyptic number.

66113161850 is a deficient number, since it is larger than the sum of its proper divisors (56864964070).

66113161850 is a wasteful number, since it uses less digits than its factorization.

66113161850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82214 (or 82209 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

It can be divided in two parts, 6611316 and 1850, that added together give a palindrome (6613166).

The spelling of 66113161850 in words is "sixty-six billion, one hundred thirteen million, one hundred sixty-one thousand, eight hundred fifty".