664851106 has 4 divisors (see below), whose sum is σ = 997276662. Its totient is φ = 332425552.

The previous prime is 664851101. The next prime is 664851107. The reversal of 664851106 is 601158466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 520250481 + 144600625 = 22809^2 + 12025^2 .

It is not an unprimeable number, because it can be changed into a prime (664851101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166212775 + ... + 166212778.

Almost surely, 2^664851106 is an apocalyptic number.

664851106 is a deficient number, since it is larger than the sum of its proper divisors (332425556).

664851106 is a wasteful number, since it uses less digits than its factorization.

664851106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332425555.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 664851106 is about 25784.7068240071. The cubic root of 664851106 is about 872.7867245925.

The spelling of 664851106 in words is "six hundred sixty-four million, eight hundred fifty-one thousand, one hundred six".