625766561 has 8 divisors (see below), whose sum is σ = 715333440. Its totient is φ = 536242608.

The previous prime is 625766483. The next prime is 625766563. The reversal of 625766561 is 165667526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625766561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (625766563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31715 + ... + 47511.

It is an arithmetic number, because the mean of its divisors is an integer number (89416680).

Almost surely, 2^625766561 is an apocalyptic number.

It is an amenable number.

625766561 is a deficient number, since it is larger than the sum of its proper divisors (89566879).

625766561 is a wasteful number, since it uses less digits than its factorization.

625766561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21463.

The product of its digits is 453600, while the sum is 44.

The square root of 625766561 is about 25015.3265219545. The cubic root of 625766561 is about 855.3373774286.

The spelling of 625766561 in words is "six hundred twenty-five million, seven hundred sixty-six thousand, five hundred sixty-one".