623666326 has 4 divisors (see below), whose sum is σ = 935499492. Its totient is φ = 311833162.

The previous prime is 623666311. The next prime is 623666353.

623666326 is nontrivially palindromic in base 10.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155916580 + ... + 155916583.

It is an arithmetic number, because the mean of its divisors is an integer number (233874873).

Almost surely, 2^623666326 is an apocalyptic number.

623666326 is a deficient number, since it is larger than the sum of its proper divisors (311833166).

623666326 is a wasteful number, since it uses less digits than its factorization.

623666326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311833165.

The product of its digits is 279936, while the sum is 40.

The square root of 623666326 is about 24973.3122753070. The cubic root of 623666326 is about 854.3793934649.

The spelling of 623666326 in words is "six hundred twenty-three million, six hundred sixty-six thousand, three hundred twenty-six".