625113661 has 16 divisors (see below), whose sum is σ = 680961600. Its totient is φ = 571874688.

The previous prime is 625113659. The next prime is 625113689. The reversal of 625113661 is 166311526.

625113661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 625113661 - 2¹ = 625113659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625113061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68415 + ... + 77011.

It is an arithmetic number, because the mean of its divisors is an integer number (42560100).

Almost surely, 2^625113661 is an apocalyptic number.

It is an amenable number.

625113661 is a deficient number, since it is larger than the sum of its proper divisors (55847939).

625113661 is a wasteful number, since it uses less digits than its factorization.

625113661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8748.

The product of its digits is 6480, while the sum is 31.

The square root of 625113661 is about 25002.2731166588. The cubic root of 625113661 is about 855.0397988838.

The spelling of 625113661 in words is "six hundred twenty-five million, one hundred thirteen thousand, six hundred sixty-one".