668562106 has 8 divisors (see below), whose sum is σ = 1009574100. Its totient is φ = 332037408.

The previous prime is 668562079. The next prime is 668562107. The reversal of 668562106 is 601265866.

It can be written as a sum of positive squares in 2 ways, for example, as 535505881 + 133056225 = 23141^2 + 11535^2 .

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

It is not an unprimeable number, because it can be changed into a prime (668562107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121451 + ... + 1122046.

Almost surely, 2^668562106 is an apocalyptic number.

668562106 is a deficient number, since it is larger than the sum of its proper divisors (341011994).

668562106 is a wasteful number, since it uses less digits than its factorization.

668562106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2243648.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 668562106 is about 25856.5679470420. The cubic root of 668562106 is about 874.4075907341.

The spelling of 668562106 in words is "six hundred sixty-eight million, five hundred sixty-two thousand, one hundred six".