103661668 has 18 divisors (see below), whose sum is σ = 199399718. Its totient is φ = 47118720.

The previous prime is 103661647. The next prime is 103661681. The reversal of 103661668 is 866166301.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 100641024 + 3020644 = 10032^2 + 1738^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106605 + ... + 107572.

Almost surely, 2^103661668 is an apocalyptic number.

It is an amenable number.

103661668 is a deficient number, since it is larger than the sum of its proper divisors (95738050).

103661668 is a wasteful number, since it uses less digits than its factorization.

103661668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214203 (or 214190 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 103661668 is about 10181.4374230754. The cubic root of 103661668 is about 469.7564272860.

It can be divided in two parts, 103661 and 668, that added together give a square (104329 = 323²).

The spelling of 103661668 in words is "one hundred three million, six hundred sixty-one thousand, six hundred sixty-eight".