662791938861 has 8 divisors (see below), whose sum is σ = 951701245600. Its totient is φ = 407871962352.

The previous prime is 662791938857. The next prime is 662791938877. The reversal of 662791938861 is 168839197266.

662791938861 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.

It is not a de Polignac number, because 662791938861 - 2² = 662791938857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 662791938792 and 662791938801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662791938811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8497332511 + ... + 8497332588.

It is an arithmetic number, because the mean of its divisors is an integer number (118962655700).

Almost surely, 2^662791938861 is an apocalyptic number.

It is an amenable number.

662791938861 is a deficient number, since it is larger than the sum of its proper divisors (288909306739).

662791938861 is a wasteful number, since it uses less digits than its factorization.

662791938861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16994665115.

The product of its digits is 47029248, while the sum is 66.

The spelling of 662791938861 in words is "six hundred sixty-two billion, seven hundred ninety-one million, nine hundred thirty-eight thousand, eight hundred sixty-one".