660974725 has 12 divisors (see below), whose sum is σ = 820698340. Its totient is φ = 528076800.

The previous prime is 660974723. The next prime is 660974753. The reversal of 660974725 is 527479066.

660974725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 116079076 + 544895649 = 10774^2 + 23343^2 .

It is not a de Polignac number, because 660974725 - 2¹ = 660974723 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660974723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2035 + ... + 36415.

Almost surely, 2^660974725 is an apocalyptic number.

It is an amenable number.

660974725 is a deficient number, since it is larger than the sum of its proper divisors (159723615).

660974725 is a wasteful number, since it uses less digits than its factorization.

660974725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35160 (or 35155 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 46.

The square root of 660974725 is about 25709.4287178848. The cubic root of 660974725 is about 871.0871708506.

The spelling of 660974725 in words is "six hundred sixty million, nine hundred seventy-four thousand, seven hundred twenty-five".