664214157106 has 4 divisors (see below), whose sum is σ = 996321235662. Its totient is φ = 332107078552.

The previous prime is 664214157073. The next prime is 664214157107. The reversal of 664214157106 is 601751412466.

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., 475836456481 + 188377700625 = 689809^2 + 434025^2 .

It is not an unprimeable number, because it can be changed into a prime (664214157107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166053539275 + ... + 166053539278.

Almost surely, 2^664214157106 is an apocalyptic number.

664214157106 is a deficient number, since it is larger than the sum of its proper divisors (332107078556).

664214157106 is a wasteful number, since it uses less digits than its factorization.

664214157106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332107078555.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 664214157106 in words is "six hundred sixty-four billion, two hundred fourteen million, one hundred fifty-seven thousand, one hundred six".