664346146 has 4 divisors (see below), whose sum is σ = 996519222. Its totient is φ = 332173072.

The previous prime is 664346141. The next prime is 664346159. The reversal of 664346146 is 641643466.

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., 589955521 + 74390625 = 24289^2 + 8625^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664346099 and 664346108.

It is not an unprimeable number, because it can be changed into a prime (664346141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166086535 + ... + 166086538.

Almost surely, 2^664346146 is an apocalyptic number.

664346146 is a deficient number, since it is larger than the sum of its proper divisors (332173076).

664346146 is a wasteful number, since it uses less digits than its factorization.

664346146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332173075.

The product of its digits is 248832, while the sum is 40.

The square root of 664346146 is about 25774.9131133356. The cubic root of 664346146 is about 872.5657056781.

The spelling of 664346146 in words is "six hundred sixty-four million, three hundred forty-six thousand, one hundred forty-six".