625545866 has 32 divisors (see below), whose sum is σ = 1037076480. Its totient is φ = 280627200.

The previous prime is 625545859. The next prime is 625545871. The reversal of 625545866 is 668545526.

It is a self number, because there is not a number n which added to its sum of digits gives 625545866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 672890 + ... + 673818.

It is an arithmetic number, because the mean of its divisors is an integer number (32408640).

Almost surely, 2^625545866 is an apocalyptic number.

625545866 is a deficient number, since it is larger than the sum of its proper divisors (411530614).

625545866 is a wasteful number, since it uses less digits than its factorization.

625545866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310.

The product of its digits is 1728000, while the sum is 47.

The square root of 625545866 is about 25010.9149372829. The cubic root of 625545866 is about 855.2368123030.

The spelling of 625545866 in words is "six hundred twenty-five million, five hundred forty-five thousand, eight hundred sixty-six".