662980861 has 8 divisors (see below), whose sum is σ = 686208600. Its totient is φ = 639777600.

The previous prime is 662980823. The next prime is 662980891. The reversal of 662980861 is 168089266.

662980861 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 4 ways, for example, as 393824025 + 269156836 = 19845^2 + 16406^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 662980861 - 2¹⁵ = 662948093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662980891) 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, 62011 + ... + 71911.

It is an arithmetic number, because the mean of its divisors is an integer number (85776075).

Almost surely, 2^662980861 is an apocalyptic number.

It is an amenable number.

662980861 is a deficient number, since it is larger than the sum of its proper divisors (23227739).

662980861 is a wasteful number, since it uses less digits than its factorization.

662980861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12239.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 662980861 is about 25748.4147279012. The cubic root of 662980861 is about 871.9675647427.

The spelling of 662980861 in words is "six hundred sixty-two million, nine hundred eighty thousand, eight hundred sixty-one".