662131121838 has 8 divisors (see below), whose sum is σ = 1324262243688. Its totient is φ = 220710373944.

The previous prime is 662131121831. The next prime is 662131121843. The reversal of 662131121838 is 838121131266.

It is a happy number.

662131121838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

662131121838 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 662131121838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662131121831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55177593481 + ... + 55177593492.

It is an arithmetic number, because the mean of its divisors is an integer number (165532780461).

Almost surely, 2^662131121838 is an apocalyptic number.

662131121838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

662131121838 is a wasteful number, since it uses less digits than its factorization.

662131121838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110355186978.

The product of its digits is 82944, while the sum is 42.

The spelling of 662131121838 in words is "six hundred sixty-two billion, one hundred thirty-one million, one hundred twenty-one thousand, eight hundred thirty-eight".