66918142203 has 32 divisors (see below), whose sum is σ = 99031375872. Its totient is φ = 39855847200.

The previous prime is 66918142171. The next prime is 66918142223. The reversal of 66918142203 is 30224181966.

It is not a de Polignac number, because 66918142203 - 2⁵ = 66918142171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66918142223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370126 + ... + 520412.

It is an arithmetic number, because the mean of its divisors is an integer number (3094730496).

Almost surely, 2^66918142203 is an apocalyptic number.

66918142203 is a deficient number, since it is larger than the sum of its proper divisors (32113233669).

66918142203 is a wasteful number, since it uses less digits than its factorization.

66918142203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150535.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 66918142203 in words is "sixty-six billion, nine hundred eighteen million, one hundred forty-two thousand, two hundred three".