525540665 has 64 divisors (see below), whose sum is σ = 746807040. Its totient is φ = 351682560.

The previous prime is 525540661. The next prime is 525540667. The reversal of 525540665 is 566045525.

It is a happy number.

It is not a de Polignac number, because 525540665 - 2² = 525540661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (525540661) 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 63 ways as a sum of consecutive naturals, for example, 4911542 + ... + 4911648.

It is an arithmetic number, because the mean of its divisors is an integer number (11668860).

Almost surely, 2^525540665 is an apocalyptic number.

It is an amenable number.

525540665 is a deficient number, since it is larger than the sum of its proper divisors (221266375).

525540665 is a wasteful number, since it uses less digits than its factorization.

525540665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282.

The product of its (nonzero) digits is 180000, while the sum is 38.

The square root of 525540665 is about 22924.6737163258. The cubic root of 525540665 is about 806.9911563834.

The spelling of 525540665 in words is "five hundred twenty-five million, five hundred forty thousand, six hundred sixty-five".