662861641 has 16 divisors (see below), whose sum is σ = 736282624. Its totient is φ = 592873344.

The previous prime is 662861629. The next prime is 662861651. The reversal of 662861641 is 146168266.

It is a happy number.

662861641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662861641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 662861594 and 662861603.

It is not an unprimeable number, because it can be changed into a prime (662861611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66325 + ... + 75661.

It is an arithmetic number, because the mean of its divisors is an integer number (46017664).

Almost surely, 2^662861641 is an apocalyptic number.

It is an amenable number.

662861641 is a deficient number, since it is larger than the sum of its proper divisors (73420983).

662861641 is a wasteful number, since it uses less digits than its factorization.

662861641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9520.

The product of its digits is 82944, while the sum is 40.

The square root of 662861641 is about 25746.0995298317. The cubic root of 662861641 is about 871.9152946541.

The spelling of 662861641 in words is "six hundred sixty-two million, eight hundred sixty-one thousand, six hundred forty-one".