664748658106 has 16 divisors (see below), whose sum is σ = 1074323603304. Its totient is φ = 306664545024.

The previous prime is 664748658059. The next prime is 664748658151. The reversal of 664748658106 is 601856847466.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 77442541225 + 587306116881 = 278285^2 + 766359^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5881611 + ... + 5993566.

Almost surely, 2^664748658106 is an apocalyptic number.

664748658106 is a deficient number, since it is larger than the sum of its proper divisors (409574945198).

664748658106 is a wasteful number, since it uses less digits than its factorization.

664748658106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11877345.

The product of its (nonzero) digits is 46448640, while the sum is 61.

The spelling of 664748658106 in words is "six hundred sixty-four billion, seven hundred forty-eight million, six hundred fifty-eight thousand, one hundred six".