664232546 has 4 divisors (see below), whose sum is σ = 996348822. Its totient is φ = 332116272.

The previous prime is 664232539. The next prime is 664232549. The reversal of 664232546 is 645232466.

664232546 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 645232466 = 2 ⋅322616233.

It can be written as a sum of positive squares in only one way, i.e., 511438225 + 152794321 = 22615^2 + 12361^2 .

It is not an unprimeable number, because it can be changed into a prime (664232549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166058135 + ... + 166058138.

Almost surely, 2^664232546 is an apocalyptic number.

664232546 is a deficient number, since it is larger than the sum of its proper divisors (332116276).

664232546 is a wasteful number, since it uses less digits than its factorization.

664232546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332116275.

The product of its digits is 207360, while the sum is 38.

The square root of 664232546 is about 25772.7093259517. The cubic root of 664232546 is about 872.5159679948.

The spelling of 664232546 in words is "six hundred sixty-four million, two hundred thirty-two thousand, five hundred forty-six".