525760661 has 4 divisors (see below), whose sum is σ = 531180972. Its totient is φ = 520340352.

The previous prime is 525760643. The next prime is 525760663. The reversal of 525760661 is 166067525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 399760036 + 126000625 = 19994^2 + 11225^2 .

It is a cyclic number.

It is not a de Polignac number, because 525760661 - 2⁶ = 525760597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525760663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2710010 + ... + 2710203.

It is an arithmetic number, because the mean of its divisors is an integer number (132795243).

Almost surely, 2^525760661 is an apocalyptic number.

It is an amenable number.

525760661 is a deficient number, since it is larger than the sum of its proper divisors (5420311).

525760661 is an equidigital number, since it uses as much as digits as its factorization.

525760661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5420310.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 525760661 is about 22929.4714505154. The cubic root of 525760661 is about 807.1037452349.

The spelling of 525760661 in words is "five hundred twenty-five million, seven hundred sixty thousand, six hundred sixty-one".