666413326 has 4 divisors (see below), whose sum is σ = 999619992. Its totient is φ = 333206662.

The previous prime is 666413309. The next prime is 666413351. The reversal of 666413326 is 623314666.

666413326 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.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166603330 + ... + 166603333.

It is an arithmetic number, because the mean of its divisors is an integer number (249904998).

Almost surely, 2^666413326 is an apocalyptic number.

666413326 is a deficient number, since it is larger than the sum of its proper divisors (333206666).

666413326 is a wasteful number, since it uses less digits than its factorization.

666413326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333206665.

The product of its digits is 93312, while the sum is 37.

The square root of 666413326 is about 25814.9825876370. The cubic root of 666413326 is about 873.4697939878.

The spelling of 666413326 in words is "six hundred sixty-six million, four hundred thirteen thousand, three hundred twenty-six".