664418146 has 12 divisors (see below), whose sum is σ = 1159342038. Its totient is φ = 284750592.

The previous prime is 664418141. The next prime is 664418147. The reversal of 664418146 is 641814466.

It can be written as a sum of positive squares in only one way, i.e., 651015225 + 13402921 = 25515^2 + 3661^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664418099 and 664418108.

It is not an unprimeable number, because it can be changed into a prime (664418141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3389791 + ... + 3389986.

Almost surely, 2^664418146 is an apocalyptic number.

664418146 is a deficient number, since it is larger than the sum of its proper divisors (494923892).

664418146 is a wasteful number, since it uses less digits than its factorization.

664418146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6779793 (or 6779786 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 664418146 is about 25776.3097824339. The cubic root of 664418146 is about 872.5972266263.

The spelling of 664418146 in words is "six hundred sixty-four million, four hundred eighteen thousand, one hundred forty-six".