664362650106 has 20 divisors (see below), whose sum is σ = 1488664457082. Its totient is φ = 221454216648.

The previous prime is 664362650101. The next prime is 664362650123. The reversal of 664362650106 is 601056263466.

664362650106 is a `hidden beast` number, since 6 + 6 + 4 + 3 + 626 + 5 + 0 + 10 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 561389049081 + 102973601025 = 749259^2 + 320895^2 .

It is a super-2 number, since 2×664362650106² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664362650101) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2050501845 + ... + 2050502168.

Almost surely, 2^664362650106 is an apocalyptic number.

664362650106 is an abundant number, since it is smaller than the sum of its proper divisors (824301806976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664362650106 is a wasteful number, since it uses less digits than its factorization.

664362650106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4101004027 (or 4101004018 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

The spelling of 664362650106 in words is "six hundred sixty-four billion, three hundred sixty-two million, six hundred fifty thousand, one hundred six".