623966 has 12 divisors (see below), whose sum is σ = 1088928. Its totient is φ = 267372.

The previous prime is 623963. The next prime is 623977. The reversal of 623966 is 669326.

623966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3086 + ... + 3281.

It is an arithmetic number, because the mean of its divisors is an integer number (90744).

2⁶²³⁹⁶⁶ is an apocalyptic number.

623966 is a deficient number, since it is larger than the sum of its proper divisors (464962).

623966 is a wasteful number, since it uses less digits than its factorization.

623966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383 (or 6376 counting only the distinct ones).

The product of its digits is 11664, while the sum is 32.

The square root of 623966 is about 789.9151853206. The cubic root of 623966 is about 85.4516215716.

The spelling of 623966 in words is "six hundred twenty-three thousand, nine hundred sixty-six".