662442661 has 6 divisors (see below), whose sum is σ = 671646930. Its totient is φ = 653362848.

The previous prime is 662442647. The next prime is 662442701. The reversal of 662442661 is 166244266.

662442661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 52056225 + 610386436 = 7215^2 + 24706^2 .

It is not a de Polignac number, because 662442661 - 2⁵ = 662442629 is a prime.

It is a super-2 number, since 2×662442661² = 877660558225521842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 662442661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662442611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56826 + ... + 67483.

It is an arithmetic number, because the mean of its divisors is an integer number (111941155).

Almost surely, 2^662442661 is an apocalyptic number.

It is an amenable number.

662442661 is a deficient number, since it is larger than the sum of its proper divisors (9204269).

662442661 is an equidigital number, since it uses as much as digits as its factorization.

662442661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124455 (or 124382 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 662442661 is about 25737.9614771644. The cubic root of 662442661 is about 871.7315498906.

The spelling of 662442661 in words is "six hundred sixty-two million, four hundred forty-two thousand, six hundred sixty-one".