2525586661 has 8 divisors (see below), whose sum is σ = 2720254040. Its totient is φ = 2330975232.

The previous prime is 2525586659. The next prime is 2525586667. The reversal of 2525586661 is 1666855252.

It can be written as a sum of positive squares in 4 ways, for example, as 176730436 + 2348856225 = 13294^2 + 48465^2 .

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 2525586661 - 2¹ = 2525586659 is a prime.

It is a super-2 number, since 2×2525586661² = 12757175964442257842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2525586667) 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, 160021 + ... + 175093.

It is an arithmetic number, because the mean of its divisors is an integer number (340031755).

Almost surely, 2^2525586661 is an apocalyptic number.

It is an amenable number.

2525586661 is a deficient number, since it is larger than the sum of its proper divisors (194667379).

2525586661 is a wasteful number, since it uses less digits than its factorization.

2525586661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27975.

The product of its digits is 864000, while the sum is 46.

The square root of 2525586661 is about 50255.2152617019. The cubic root of 2525586661 is about 1361.8232935750.

The spelling of 2525586661 in words is "two billion, five hundred twenty-five million, five hundred eighty-six thousand, six hundred sixty-one".