655725751 has 8 divisors (see below), whose sum is σ = 711232704. Its totient is φ = 602100480.

The previous prime is 655725743. The next prime is 655725767. The reversal of 655725751 is 157527556.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 655725751 - 2³ = 655725743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 655725698 and 655725707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655725781) 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, 469695 + ... + 471088.

It is an arithmetic number, because the mean of its divisors is an integer number (88904088).

Almost surely, 2^655725751 is an apocalyptic number.

655725751 is a deficient number, since it is larger than the sum of its proper divisors (55506953).

655725751 is a wasteful number, since it uses less digits than its factorization.

655725751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940841.

The product of its digits is 367500, while the sum is 43.

The square root of 655725751 is about 25607.1425778043. The cubic root of 655725751 is about 868.7751959568.

The spelling of 655725751 in words is "six hundred fifty-five million, seven hundred twenty-five thousand, seven hundred fifty-one".