561673966 has 24 divisors (see below), whose sum is σ = 998564760. Its totient is φ = 236173392.

The previous prime is 561673933. The next prime is 561674011. The reversal of 561673966 is 669376165.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48876 + ... + 59263.

It is an arithmetic number, because the mean of its divisors is an integer number (41606865).

Almost surely, 2^561673966 is an apocalyptic number.

561673966 is a deficient number, since it is larger than the sum of its proper divisors (436890794).

561673966 is a wasteful number, since it uses less digits than its factorization.

561673966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108208 (or 108201 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 49.

The square root of 561673966 is about 23699.6617275437. The cubic root of 561673966 is about 825.0775395746.

The spelling of 561673966 in words is "five hundred sixty-one million, six hundred seventy-three thousand, nine hundred sixty-six".