623306566 has 4 divisors (see below), whose sum is σ = 934959852. Its totient is φ = 311653282.

The previous prime is 623306549. The next prime is 623306569. The reversal of 623306566 is 665603326.

623306566 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 super-2 number, since 2×623306566² = 777022150437424712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623306569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155826640 + ... + 155826643.

It is an arithmetic number, because the mean of its divisors is an integer number (233739963).

Almost surely, 2^623306566 is an apocalyptic number.

623306566 is a deficient number, since it is larger than the sum of its proper divisors (311653286).

623306566 is a wasteful number, since it uses less digits than its factorization.

623306566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311653285.

The product of its (nonzero) digits is 116640, while the sum is 37.

The square root of 623306566 is about 24966.1083471173. The cubic root of 623306566 is about 854.2150798253.

The spelling of 623306566 in words is "six hundred twenty-three million, three hundred six thousand, five hundred sixty-six".